{"id":58928,"date":"2025-07-10T17:28:19","date_gmt":"2025-07-10T17:28:19","guid":{"rendered":""},"modified":"2025-10-24T11:55:22","modified_gmt":"2025-10-24T17:55:22","slug":"cve-2025-6926-bypassing-authentication-in-mediawiki-centralauth-extension","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6926-bypassing-authentication-in-mediawiki-centralauth-extension\/","title":{"rendered":"<strong>CVE-2025-6926: Bypassing Authentication in Mediawiki &#8211; CentralAuth Extension<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-6926 is a serious cybersecurity vulnerability that affects the Mediawiki &#8211; CentralAuth Extension. This improper authentication vulnerability allows attackers to bypass authentication measures, potentially compromising systems and leading to data leakage. Given the widespread use of Mediawiki &#8211; CentralAuth Extension for managing multiple wikis, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44955-critical-vulnerability-in-ruckus-network-director-allows-jail-users-to-gain-root-access\/\"  data-wpil-monitor-id=\"76100\">vulnerability poses a significant risk to organizations and users<\/a> that depend on this software for their day-to-day operations.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6926<br \/>\nSeverity: High (8.8 on the CVSS Severity Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52817-authorization-bypass-in-zealousweb-abandoned-contact-form-7-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"65718\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-470824154\" 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: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\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: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\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: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53369-mediawiki-short-description-extension-vulnerability\/\"  data-wpil-monitor-id=\"91423\">Mediawiki &#8211; CentralAuth Extension<\/a> | 1.39.X before 1.39.13<br \/>\nMediawiki &#8211; CentralAuth Extension | 1.42.X before 1.42.7<br \/>\nMediawiki &#8211; CentralAuth Extension | 1.43.X before 1.43.2<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53093-critical-security-vulnerability-in-tabberneue-mediawiki-extension\/\"  data-wpil-monitor-id=\"65701\">vulnerability stems from an improper authentication mechanism in the Mediawiki<\/a> &#8211; CentralAuth Extension. This flaw can be exploited by attackers to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25171-authentication-bypass-vulnerability-in-wp-smartpay\/\"  data-wpil-monitor-id=\"65565\">bypass authentication<\/a> processes, allowing unauthorized access to the system. Such a security breach can result in <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2015-10143-unauthorized-modification-vulnerability-in-wordpress-platform-theme\/\"  data-wpil-monitor-id=\"69007\">unauthorized modifications<\/a>, potential system compromise, and data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1915524807\" 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>In exploiting this vulnerability, an attacker may send a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53314-high-severity-cross-site-request-forgery-csrf-vulnerability-in-sh1zen-wp-optimizer\/\"  data-wpil-monitor-id=\"65586\">request like the following to the vulnerable<\/a> system:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/mediawiki\/api.php?format=json&amp;action=centralauth&amp;submodule=mergeaccount HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;username&quot;: &quot;admin&quot;, &quot;password&quot;: &quot;1234&quot; }<\/code><\/pre>\n<p>This is a conceptual example and the actual payload would depend on the specifics of the targeted system.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The best way to safeguard your <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-33077-local-stack-based-buffer-overflow-vulnerability-in-ibm-engineering-systems-design-rhapsody\/\"  data-wpil-monitor-id=\"69008\">system against this vulnerability<\/a> is to apply the vendor-supplied patch immediately. For Mediawiki &#8211; CentralAuth Extension, this means updating to version 1.39.13, 1.42.7, or 1.43.2 depending on your current version. In the interim, you may also use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation. However, these should not be considered long-term solutions, as they do not effectively resolve the underlying vulnerability.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-6926 is a serious cybersecurity vulnerability that affects the Mediawiki &#8211; CentralAuth Extension. This improper authentication vulnerability allows attackers to bypass authentication measures, potentially compromising systems and leading to data leakage. Given the widespread use of Mediawiki &#8211; CentralAuth Extension for managing multiple wikis, the vulnerability poses a significant risk to organizations and users [&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":[75],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-58928","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-authentication-bypass"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58928","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=58928"}],"version-history":[{"count":7,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58928\/revisions"}],"predecessor-version":[{"id":84530,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58928\/revisions\/84530"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=58928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=58928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=58928"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=58928"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=58928"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=58928"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=58928"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=58928"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=58928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}