{"id":7379,"date":"2026-09-14T16:57:01","date_gmt":"2026-09-14T16:57:01","guid":{"rendered":"https:\/\/www.hostarmada.com\/blog\/?p=7379"},"modified":"2026-09-14T17:52:11","modified_gmt":"2026-09-14T17:52:11","slug":"how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues","status":"publish","type":"post","link":"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/","title":{"rendered":"How to Fix Redirect Errors Caused by Cookie and Cache Issues"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Redirect loops are one of the more disorienting errors you can run into. The page keeps bouncing, the browser gives up, and nothing you click seems to help. If your server config looks clean and your CDN rules check out, the culprit is often sitting much closer to home: your browser cookies or cached data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide covers exactly how cookies and cache trigger redirect errors, how to clear them correctly at every layer, and how to make sure the problem stays fixed.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #565656;color:#565656\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #565656;color:#565656\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#What_Is_a_Cookie_Redirect_Loop_and_Why_Does_It_Happen\" >What Is a Cookie Redirect Loop and Why Does It Happen?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#Step_1_Test_the_Redirect_in_a_Private_Window\" >Step 1: Test the Redirect in a Private Window<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#Step_2_Clear_Cookies_for_the_Specific_Site\" >Step 2: Clear Cookies for the Specific Site<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#Step_3_Clear_the_Browser_Cache\" >Step 3: Clear the Browser Cache<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#Step_4_Clear_Your_WordPress_or_CMS_Cache\" >Step 4: Clear Your WordPress or CMS Cache<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#Step_5_Purge_the_Server_or_CDN_Page_Cache\" >Step 5: Purge the Server or CDN Page Cache<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#How_WordPress_Authentication_Cookies_Cause_Login_Redirect_Loops\" >How WordPress Authentication Cookies Cause Login Redirect Loops<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#How_PHP_Sessions_Can_Interfere_With_WordPress_Caching\" >How PHP Sessions Can Interfere With WordPress Caching<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#Cookie_Domain_Mismatches_Across_Subdomains_and_www_URLs\" >Cookie Domain Mismatches Across Subdomains and www URLs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#SameSite_Cookie_Attribute_and_External_Redirect_Loops\" >SameSite Cookie Attribute and External Redirect Loops<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#Quick_Diagnosis_Is_the_Loop_Local_or_Global\" >Quick Diagnosis: Is the Loop Local or Global?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#Preventing_Cookie_and_Cache_Redirect_Loops\" >Preventing Cookie and Cache Redirect Loops<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/#FAQs\" >FAQs<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"h-what-is-a-cookie-redirect-loop-and-why-does-it-happen\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_a_Cookie_Redirect_Loop_and_Why_Does_It_Happen\"><\/span>What Is a Cookie Redirect Loop and Why Does It Happen?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When you visit a website, your browser stores small pieces of data called cookies. These hold things like your login state, preferences, and session information. They help the site recognize you on your next visit and route you to the right page.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The problem is that cookies can become corrupted, outdated, or mismatched, particularly after a site migration, an HTTP to HTTPS switch, or a domain change. When that happens, the cookie instructs your browser to follow a redirect path that no longer exists or points back to itself, creating a loop the browser cannot escape.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cache works similarly. Your browser, your server, and your CDN all store copies of pages to serve them faster. If a broken redirect response gets cached at any of these layers, it keeps getting served even after the underlying issue has been fixed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The key thing to understand:<\/strong> a redirect loop caused by cookies or cache is often a local issue. You might be stuck in a loop while everyone else on the same site loads it just fine.<\/p>\n\n\n\n<h2 id=\"h-step-1-test-the-redirect-in-a-private-window\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_1_Test_the_Redirect_in_a_Private_Window\"><\/span>Step 1: Test the Redirect in a Private Window<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before clearing anything, open the problem URL in an incognito or private browser window. This bypasses both your stored cookies and your local browser cache in one move.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>If the page loads fine in incognito:<\/strong> the issue is local. Your cookies or browser cache are the cause.<\/li>\n\n\n\n<li><strong>If the page still loops in a private window:<\/strong> the problem is probably not limited to cookies or cache stored in your normal browser profile. Test another browser or device and then inspect the site&#8217;s application, redirect, CDN, and server configuration.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This single test tells you exactly where to focus and saves a lot of time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pro Tip:<\/strong> Test in a completely different browser too (e.g., if you normally use Chrome, try Firefox). If it loads there, Chrome&#8217;s stored data is definitely the issue.<\/p>\n\n\n\n<h2 id=\"h-step-2-clear-cookies-for-the-specific-site\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_2_Clear_Cookies_for_the_Specific_Site\"><\/span>Step 2: Clear Cookies for the Specific Site<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The fastest first fix is deleting cookies for just the problem domain, not your entire browser history. This resets your session with that site without disrupting anything else.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Google Chrome:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Go to <strong>Settings<\/strong> &gt; <strong>Privacy and security<\/strong> &gt; <strong>Third-party cookies.<\/strong><\/li>\n\n\n\n<li>Scroll to <strong>See all site data and permissions.<\/strong><\/li>\n\n\n\n<li>Search for the domain, click the trash icon.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mozilla Firefox:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Settings<\/strong> &gt; <strong>Privacy &amp; Security<\/strong><\/li>\n\n\n\n<li>Under <strong>Cookies and Site Data<\/strong>, click <strong>Manage Data.<\/strong><\/li>\n\n\n\n<li>Find the domain, select it, and click <strong>Remove Selected.<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Safari:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Safari<\/strong> &gt; <strong>Settings<\/strong> &gt; <strong>Privacy.<\/strong><\/li>\n\n\n\n<li>Click <strong>Manage Website Data<\/strong>, find the site, and click <strong>Remove.<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">After clearing, do a hard refresh with <strong>Ctrl+Shift+R<\/strong> (Windows\/Linux) or <strong>Cmd+Shift+R<\/strong> (Mac) and test the URL again.<\/p>\n\n\n\n<h2 id=\"h-step-3-clear-the-browser-cache\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_3_Clear_the_Browser_Cache\"><\/span>Step 3: Clear the Browser Cache<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If clearing site-specific cookies didn&#8217;t resolve the loop, the next step is your full browser cache. Cache and cookies are different things: cookies store session and identity data, while cache stores page assets like HTML, images, and scripts. A previously cached HTTP redirect response or other stale browser data can continue sending the browser to the wrong URL even after the site&#8217;s configuration has changed.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chrome:<\/strong> <strong>Settings<\/strong> &gt; <strong>Privacy and security<\/strong> &gt; <strong>Delete browsing data<\/strong> &gt; check <strong>Cached images and files<\/strong> &gt; set time range to <strong>All time<\/strong> &gt; <strong>Delete data.<\/strong><\/li>\n\n\n\n<li><strong>Firefox:<\/strong> <strong>Options<\/strong> &gt; <strong>Privacy &amp; Security<\/strong> &gt; <strong>Clear Data<\/strong> &gt; uncheck cookies, leave cached files checked &gt; <strong>Clear.<\/strong><\/li>\n\n\n\n<li><strong>Safari:<\/strong> <strong>Develop<\/strong> menu (enable it under <strong>Advanced<\/strong> settings) &gt; <strong>Empty Caches<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pro Tip:<\/strong> You can also force a cache-bypass refresh without clearing everything. Use <strong>Ctrl+F5<\/strong> on Windows or <strong>Cmd+Shift+R<\/strong> on Mac to reload the page while skipping the local cache.<\/p>\n\n\n\n<h2 id=\"h-step-4-clear-your-wordpress-or-cms-cache\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_4_Clear_Your_WordPress_or_CMS_Cache\"><\/span>Step 4: Clear Your WordPress or CMS Cache<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you manage a WordPress site and the error is affecting visitors or you cannot access the admin dashboard, the issue may be a stale cached redirect response baked into your caching plugin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common plugin steps:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>WP Super Cache:<\/strong> <strong>Settings<\/strong> &gt; <strong>WP Super Cache<\/strong> &gt; <strong>Delete Cache<\/strong><\/li>\n\n\n\n<li><strong>W3 Total Cache:<\/strong> <strong>Performance<\/strong> &gt; <strong>Purge All Caches<\/strong><\/li>\n\n\n\n<li><strong>WP Rocket:<\/strong> <strong>WP Rocket<\/strong> toolbar &gt; <strong>Clear Cache<\/strong><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/hostarmada.com\/tutorials\/blog-cms\/wordpress\/introduction-to-wordpress-litespeed-cache\/\">LiteSpeed Cache<\/a>:<\/strong> <strong>LiteSpeed Cache<\/strong> > <strong>Purge All<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If the redirect loop has locked you out of the WordPress dashboard entirely, most hosting providers offer a one-click cache purge directly in the control panel. On HostArmada, for example, you can purge the cache from your hosting dashboard without needing admin access to WordPress at all.<\/p>\n\n\n\n<h2 id=\"h-step-5-purge-the-server-or-cdn-page-cache\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_5_Purge_the_Server_or_CDN_Page_Cache\"><\/span>Step 5: Purge the Server or CDN Page Cache<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Browser and plugin cache are user-facing. The web server itself can also cache redirect responses, and if a broken 301 or 302 got cached at this layer, it overrides everything else.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(<strong>Warning:<\/strong> Do not run broad cache-deletion commands on a production server unless you understand exactly what data they remove. Object caches such as Redis may contain application data that is unrelated to HTTP redirects.)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the redirect loop also appears in a private window, check the caching layer that can actually store HTTP responses, such as LiteSpeed, NGINX FastCGI cache, Varnish, or your CDN. Purge the relevant page or reverse-proxy cache using your hosting control panel or provider-specific tools. PHP OPcache and Redis object cache are different systems and should not be cleared as generic redirect-loop fixes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After clearing server cache, visit key pages on the site and trace through the main redirect paths to confirm the loop is gone.<\/p>\n\n\n\n<h2 id=\"h-how-wordpress-authentication-cookies-cause-login-redirect-loops\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_WordPress_Authentication_Cookies_Cause_Login_Redirect_Loops\"><\/span>How WordPress Authentication Cookies Cause Login Redirect Loops<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There&#8217;s a specific variation of this error worth calling out: the WordPress admin login loop. This is when you enter your credentials correctly, get redirected back to the login screen, and the cycle repeats.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">WordPress uses several authentication cookies. <code>wordpress_[hash]<\/code> is used for authentication in non-HTTPS contexts, <strong><code>w<\/code>ordpress_sec_[hash<code>]<\/code><\/strong> is used for secure HTTPS authentication, and <strong>wordpress_logged_in_[hash]<\/strong> identifies the logged-in user on the front end. If these cookies become invalid, typically after a URL change, a migration, or an SSL switch, WordPress cannot verify your session and keeps bouncing you back to the login page.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most common fix is to make sure <strong>WP_HOME<\/strong> and <strong>WP_SITEURL<\/strong> in <strong>wp-config.php<\/strong> match the current live URL exactly:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">php<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">define(&#8216;WP_HOME&#8217;, &#8216;https:\/\/yourdomain.com&#8217;);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">define(&#8216;WP_SITEURL&#8217;, &#8216;https:\/\/yourdomain.com&#8217;);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also verify that WordPress is not being forced to one URL format while the web server or CDN redirects visitors to another, because competing canonicalization rules can create a loop even when the WordPress values themselves are correct.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A mismatch here (like one being HTTP and the other HTTPS, or one having www and the other not) means cookies set under one URL are not recognized under the other, triggering the loop.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After updating <strong>wp-config.php<\/strong>, clear your browser cookies for the site and try logging in again.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pro Tip:<\/strong> If you specifically need to invalidate all existing WordPress authentication cookies, regenerating the site&#8217;s security keys and salts will force existing sessions to become invalid. A domain change by itself does not normally require rotating the salts. You can generate new ones at <a href=\"https:\/\/api.wordpress.org\/secret-key\/1.1\/salt\">api.wordpress.org\/secret-key\/1.1\/salt<\/a> and replace the corresponding lines in <strong>wp-config.php<\/strong>.<\/p>\n\n\n\n<h2 id=\"h-how-php-sessions-can-interfere-with-wordpress-caching\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_PHP_Sessions_Can_Interfere_With_WordPress_Caching\"><\/span>How PHP Sessions Can Interfere With WordPress Caching<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is a less visible but frustratingly common issue in WordPress environments. Some plugins and themes use PHP sessions (via <strong>session_start()<\/strong>) rather than WordPress&#8217;s native cookie-based authentication. When a PHP session starts, PHP typically uses a session identifier such as <code>PHPSESSID<\/code>. Once the browser has a valid session cookie, that identifier normally persists across subsequent requests rather than being regenerated on every request.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PHP session cookies can complicate full-page caching because many caching configurations bypass cached pages when a session cookie is present. Whether this creates a problem depends on the plugin and caching configuration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To check if a plugin is the culprit:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Deactivate all plugins via the WordPress dashboard (or rename the <strong>\/wp-content\/plugins\/<\/strong> folder via FTP if you&#8217;re locked out).<\/li>\n\n\n\n<li>Test whether the redirect loop clears.<\/li>\n\n\n\n<li>If it does, reactivate plugins one by one until the loop returns.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">The offending plugin is the one that triggers the error when reactivated. Either find an alternative or contact the developer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pro Tip:<\/strong> If you&#8217;re a developer building plugins, avoid <strong>session_start()<\/strong> entirely. For WordPress development, avoid introducing PHP sessions unless they are genuinely necessary. Use the WordPress storage mechanism appropriate to the data, such as user metadata, transients, or a purpose-built custom table.<\/p>\n\n\n\n<h2 id=\"h-cookie-domain-mismatches-across-subdomains-and-www-urls\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cookie_Domain_Mismatches_Across_Subdomains_and_www_URLs\"><\/span>Cookie Domain Mismatches Across Subdomains and www URLs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cookie scope depends on the <strong>Domain<\/strong> attribute. If no <strong>Domain<\/strong> attribute is specified, the cookie is host-only and is returned only to the host that created it. If <strong>Domain=example.com<\/strong> is specified, the cookie can also be sent to subdomains such as <strong>www.example.com<\/strong> and <strong>app.example.com<\/strong>. Redirecting between hosts with incompatible cookie scopes can break authentication and contribute to redirect loops.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The same applies to subdomains. A session cookie set on <strong>app.example.com<\/strong> will not be sent to <strong>www.example.com<\/strong> unless the cookie domain is explicitly set to cover all subdomains.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fix in PHP configuration:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">php<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ini_set(&#8216;session.cookie_domain&#8217;, &#8216;example.com&#8217;); \/\/ Note the leading dot<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">session_start();<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For WordPress specifically, ensure your <strong>siteurl<\/strong> and <strong>home<\/strong> options in the database match exactly, including the <strong>www<\/strong> or non-www format you&#8217;ve committed to. A mismatch at this level creates a permanent redirect between the two versions, and if cookies are set on one but not the other, the loop never ends.<\/p>\n\n\n\n<h2 id=\"h-samesite-cookie-attribute-and-external-redirect-loops\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SameSite_Cookie_Attribute_and_External_Redirect_Loops\"><\/span>SameSite Cookie Attribute and External Redirect Loops<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If users only hit the redirect loop when arriving from an external link, a social share, or an OAuth\/SSO login flow, the <strong>SameSite<\/strong> cookie attribute may be blocking the session cookie from being sent.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When <strong>SameSite<\/strong> is set to <strong>Strict<\/strong>, the browser will not send the cookie on any request that originates from a different domain, including redirects from external sites. This means the session is never established, and the site keeps trying to re-authenticate in a loop.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Setting it to <strong>Lax<\/strong> resolves this in most cases:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">php<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ini_set(&#8216;session.cookie_samesite&#8217;, &#8216;Lax&#8217;);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">session_start();<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lax allows the cookie to be sent on top-level navigation (clicking a link, following a redirect) from external sites, while still blocking it on cross-site subresource requests.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do not change SameSite settings blindly. Some authentication flows that require cookies on cross-site requests may need <strong>SameSite=None; Secur<code>e<\/code>, <\/strong>while many normal top-level GET navigations work correctly with <strong>Lax<\/strong>. Confirm the requirements of the authentication provider before changing this attribute.<\/p>\n\n\n\n<h2 id=\"h-quick-diagnosis-is-the-loop-local-or-global\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Quick_Diagnosis_Is_the_Loop_Local_or_Global\"><\/span>Quick Diagnosis: Is the Loop Local or Global?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before spending time on server-side fixes, confirm how widespread the issue actually is.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Test<\/strong><\/td><td><strong>What It Tells You<\/strong><\/td><\/tr><tr><td>Works in incognito, fails in normal browser<\/td><td>Local cookies or cache<\/td><\/tr><tr><td>Fails in all browsers on your machine<\/td><td>Could be server or your IP\/network<\/td><\/tr><tr><td>Fails for all visitors<\/td><td>Server, CDN, or CMS cache issue<\/td><\/tr><tr><td>Fails only after login<\/td><td>Auth cookie or session mismatch<\/td><\/tr><tr><td>Fails only from external links<\/td><td>SameSite cookie attribute<\/td><\/tr><tr><td>Fails only on www or non-www version<\/td><td>Cookie domain or URL mismatch<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Use a redirect chain tracer (tools like httpstatus.io or the Redirect Path Chrome extension) to visualize the full redirect path and pinpoint exactly where the loop occurs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tip:<\/strong> If the problem affects more than one browser or device, inspect the redirect chain before clearing additional caches. Look for repeated transitions between HTTP and HTTPS, www and non-www URLs, login and account pages, or two different redirect rules that point at each other. A redirect trace can distinguish a browser-side issue from an application or server configuration problem.<\/p>\n\n\n\n<h2 id=\"h-preventing-cookie-and-cache-redirect-loops\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Preventing_Cookie_and_Cache_Redirect_Loops\"><\/span>Preventing Cookie and Cache Redirect Loops<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A few habits prevent most of these issues from ever surfacing:<\/p>\n\n\n\n<h3 id=\"h-commit-to-one-url-format\" class=\"wp-block-heading\">Commit to One URL Format<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pick <strong>www<\/strong> or non-www, HTTP or HTTPS, and configure everything (WordPress settings, server redirects, cookies) around that one canonical form. Mixing formats is the most common cause of cookie scope errors.<\/p>\n\n\n\n<h3 id=\"h-purge-cache-after-every-redirect-rule-change\" class=\"wp-block-heading\">Purge Cache After Every Redirect Rule Change<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Any change to <strong>.htaccess,<\/strong> Nginx config, or plugin redirect settings should be followed immediately by a full cache purge at browser, plugin, and server level.<\/p>\n\n\n\n<h3 id=\"h-test-with-a-clean-session\" class=\"wp-block-heading\">Test With a Clean Session<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">After making changes, always test in incognito with cookies cleared so you&#8217;re seeing the live state of the site, not a cached version.<\/p>\n\n\n\n<h3 id=\"h-avoid-php-sessions-in-wordpress-plugins\" class=\"wp-block-heading\">Avoid PHP Sessions in WordPress Plugins<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re evaluating plugins or building your own, flag any use of <strong>session_start()<\/strong> as a potential caching conflict.<\/p>\n\n\n\n<h3 id=\"h-use-short-ttls-on-redirect-responses\" class=\"wp-block-heading\">Use Short TTLs on Redirect Responses<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Setting a short cache expiry (or <strong>Cache-Control<\/strong>: <strong>no-store<\/strong>) on 301\/302 responses means stale redirect instructions expire quickly if something changes.<\/p>\n\n\n\n<h2 id=\"h-faqs\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1789397412220\"><strong class=\"schema-faq-question\"><strong>Does clearing cookies fix redirect loops permanently?<\/strong><\/strong> <p class=\"schema-faq-answer\">Clearing cookies fixes redirect loops caused by stale or corrupted browser-side session data. It is not a permanent fix if the underlying cause is a server misconfiguration, a broken WordPress URL setting, or a plugin conflict. If the loop returns after clearing cookies, there is a server-side issue that needs to be addressed directly.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1789397436823\"><strong class=\"schema-faq-question\"><strong>Why does the redirect loop only happen in my browser and not others?<\/strong><\/strong> <p class=\"schema-faq-answer\">This happens because the loop is caused by data stored locally in your specific browser, either a cookie or cached page from a previous visit. Other users or browsers that have not cached the broken response will not experience it. Clearing your cookies and cache for the affected site resolves it.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1789397458406\"><strong class=\"schema-faq-question\"><strong>What is the difference between clearing cookies and clearing cache for fixing redirect errors?<\/strong><\/strong> <p class=\"schema-faq-answer\">Cookies store session and identity data, including login state and user preferences. Cache stores copies of page content like HTML and scripts for faster loading. Both can contain outdated redirect instructions. Clearing cookies resets your session with the site. Clearing cache forces the browser to fetch a fresh copy of the page. For redirect errors, it is best to clear both.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1789397471434\"><strong class=\"schema-faq-question\"><strong>Can a WordPress plugin cause a cookie redirect loop?<\/strong><\/strong> <p class=\"schema-faq-answer\">Yes. Plugins that use PHP sessions (session_start()), manage authentication, or handle URL redirects can create conflicts that trigger redirect loops. The most reliable way to identify the responsible plugin is to deactivate all plugins at once and then reactivate them individually until the loop reappears. Security plugins, login redirect plugins, and caching plugins are the most frequent culprits.<\/p> <\/div> <\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redirect loops are one of the more disorienting errors you can run into. The page keeps bouncing, the browser gives up, and nothing you click seems to help. If your server config looks clean and your CDN rules check out, the culprit is often sitting much closer to home: your browser cookies or cached data. [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":7381,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[104,19],"tags":[912,1352,1346,1351,920,1350,262],"class_list":["post-7379","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-errors","category-optimization","tag-browser-cache","tag-cookies","tag-http-redirects","tag-redirect-errors","tag-website-caching","tag-wordpress-login","tag-wordpress-troubleshooting"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.3 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Fix Redirect Errors Caused by Cookie and Cache Issues<\/title>\n<meta name=\"description\" content=\"Fix redirect errors caused by cookies and cache. Learn how to diagnose loops, clear browser and WordPress caches, and resolve login redirects.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Fix Redirect Errors Caused by Cookie and Cache Issues\" \/>\n<meta property=\"og:description\" content=\"Fix redirect errors caused by cookies and cache. Learn how to diagnose loops, clear browser and WordPress caches, and resolve login redirects.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.hostarmada.com\/blog\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\/\" \/>\n<meta property=\"og:site_name\" content=\"HostArmada Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/HostArmadaINC\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-14T16:57:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-14T17:52:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.hostarmada.com\/blog\/wp-content\/uploads\/2026\/09\/cookie-redirect-loop.png\" \/>\n\t<meta property=\"og:image:width\" content=\"2400\" \/>\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Emman Zahid\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@HostArmada\" \/>\n<meta name=\"twitter:site\" content=\"@HostArmada\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Emman Zahid\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/\"},\"author\":{\"name\":\"Emman Zahid\",\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/#\\\/schema\\\/person\\\/49bb87cc02a12993309187df4000dd9e\"},\"headline\":\"How to Fix Redirect Errors Caused by Cookie and Cache Issues\",\"datePublished\":\"2026-09-14T16:57:01+00:00\",\"dateModified\":\"2026-09-14T17:52:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/\"},\"wordCount\":2436,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/cookie-redirect-loop.png\",\"keywords\":[\"browser cache\",\"Cookies\",\"HTTP Redirects\",\"Redirect Errors\",\"website caching\",\"WordPress Login\",\"WordPress troubleshooting\"],\"articleSection\":[\"Errors\",\"Optimization\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/#respond\"]}]},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/\",\"url\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/\",\"name\":\"How to Fix Redirect Errors Caused by Cookie and Cache Issues\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/how-to-fix-redirect-errors-caused-by-cookie-and-cache-issues\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/cookie-redirect-loop.png\",\"datePublished\":\"2026-09-14T16:57:01+00:00\",\"dateModified\":\"2026-09-14T17:52:11+00:00\",\"description\":\"Fix redirect errors caused by cookies and cache. 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We offer Shared Hosting, WordPress Hosting, VPS Hosting, Cloud Hosting, domain registration, SSL certificates, website migration, and managed server solutions. With high-performance infrastructure, enterprise-grade security, and 24\\\/7 technical support, HostArmada helps customers build fast, secure, and reliable online experiences.\",\"email\":\"company@hostarmada.com\",\"telephone\":\"+1 (302) 549-0737\",\"legalName\":\"HostArmada INC\",\"foundingDate\":\"2019-11-06\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"minValue\":\"11\",\"maxValue\":\"50\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.hostarmada.com\\\/blog\\\/#\\\/schema\\\/person\\\/49bb87cc02a12993309187df4000dd9e\",\"name\":\"Emman Zahid\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/5e9936c90bf33f64b28ad90e22f2b5f4ad60bf036a7d2849a9655323ba4d7f28?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/5e9936c90bf33f64b28ad90e22f2b5f4ad60bf036a7d2849a9655323ba4d7f28?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/5e9936c90bf33f64b28ad90e22f2b5f4ad60bf036a7d2849a9655323ba4d7f28?s=96&d=mm&r=g\",\"caption\":\"Emman Zahid\"},\"description\":\"Emman is a Content Manager at HostArmada where she helps make complex topics accessible for readers around the world. 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