{"id":34900,"date":"2025-05-05T22:17:50","date_gmt":"2025-05-05T22:17:50","guid":{"rendered":""},"modified":"2025-08-30T04:38:57","modified_gmt":"2025-08-30T10:38:57","slug":"cve-2025-3501-keycloak-verification-policy-flaw-allows-bypass-of-trust-store-certificate-verification","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3501-keycloak-verification-policy-flaw-allows-bypass-of-trust-store-certificate-verification\/","title":{"rendered":"<strong>CVE-2025-3501: Keycloak Verification Policy Flaw Allows Bypass of Trust Store Certificate Verification<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the landscape of cybersecurity, vulnerabilities pose a constant threat to the integrity, confidentiality, and availability of data. One such vulnerability has been identified in Keycloak, a widely used open-source software product that offers single sign-on with Identity Management and Access Management aimed at modern applications and services. This vulnerability has the potential to impact a large number of organizations that rely on <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-44755-critical-sql-injection-vulnerability-in-sacco-management-system-v1-0\/\"  data-wpil-monitor-id=\"39652\">Keycloak<\/a> for their identity and access management needs. The flaw, tagged as CVE-2025-3501, allows attackers to bypass the trust store certificate verification process, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32857-sql-injection-vulnerability-in-telecontrol-server-basic-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"40148\">leading to potential system<\/a> compromise or data leakage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-3501<br \/>\nSeverity: High (CVSS: 8.2)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3914-potential-arbitrary-file-uploads-and-system-compromise-in-aeropage-sync-for-airtable-wordpress-plugin\/\"  data-wpil-monitor-id=\"40600\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2476728373\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Keycloak | All versions before the vendor patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The flaw in Keycloak resides in the verification policy. When the policy is set to &#8216;ALL&#8217;, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7390-malicious-client-bypass-of-opc-https-server-certificate-trust-check\/\"  data-wpil-monitor-id=\"81858\">trust store certificate<\/a> verification is skipped. The trust store certificate verification is a crucial part of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-36535-unrestricted-remote-access-due-to-lack-of-web-server-authentication-and-access-controls\/\"  data-wpil-monitor-id=\"52798\">authentication process as it confirms the authenticity of the server<\/a>. By bypassing this step, an attacker can impersonate the server or intercept the communication between the client and the server, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3928-unspecified-vulnerability-in-commvault-web-server-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"40384\">leading to a potential compromise of the system<\/a> and data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2216185557\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>A conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31214-a-critical-network-traffic-interception-vulnerability-in-ios-and-ipados\/\"  data-wpil-monitor-id=\"49859\">vulnerability might be exploited might involve a malicious actor intercepting<\/a> and modifying an HTTPS request. Please note that this is a simplified and non-functional example intended to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49526-out-of-bounds-write-vulnerability-in-illustrator-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"75218\">illustrate the vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">GET \/auth\/realms\/master\/protocol\/openid-connect\/auth HTTP\/1.1\nHost: vulnerable-keycloak-server.com\nUser-Agent: Mozilla\/5.0\n{\n&quot;response_type&quot;: &quot;code&quot;,\n&quot;client_id&quot;: &quot;legitimate-client-id&quot;,\n&quot;redirect_uri&quot;: &quot;https:\/\/malicious-actor.com\/fake_redirect&quot;,\n&quot;state&quot;: &quot;...&quot;\n}<\/code><\/pre>\n<p>In this example, a malicious actor could modify the &#8216;redirect_uri&#8217; parameter to redirect the authorization <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24022-critical-server-code-execution-vulnerability-in-itop-it-service-management-tool\/\"  data-wpil-monitor-id=\"49858\">code to a malicious server<\/a>. This would allow the actor to gather <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-34322-inadequate-precaution-in-xen-s-shadow-paging-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"40984\">potentially sensitive information and compromise the system<\/a>.<\/p>\n<p><strong>Mitigation and Recommendations<\/strong><\/p>\n<p>The most effective <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43971-critical-vulnerability-in-gobgp-paving-the-way-for-system-compromise\/\"  data-wpil-monitor-id=\"40147\">way to mitigate this vulnerability<\/a> is to apply the vendor patch as soon as it&#8217;s available. Until then, as a temporary measure, organizations can use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-38657-out-of-bounds-write-vulnerability-in-gtkwave-lxt2-zlib-block-decompression\/\"  data-wpil-monitor-id=\"43190\">block malicious traffic patterns related to this vulnerability<\/a>. Additionally, organizations should also consider reviewing their certificate verification policies and ensure they are configured correctly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the landscape of cybersecurity, vulnerabilities pose a constant threat to the integrity, confidentiality, and availability of data. One such vulnerability has been identified in Keycloak, a widely used open-source software product that offers single sign-on with Identity Management and Access Management aimed at modern applications and services. This vulnerability has the potential to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-34900","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34900","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=34900"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34900\/revisions"}],"predecessor-version":[{"id":74318,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34900\/revisions\/74318"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=34900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=34900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=34900"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=34900"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=34900"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=34900"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=34900"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=34900"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=34900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}