{"id":59374,"date":"2025-07-14T11:03:36","date_gmt":"2025-07-14T11:03:36","guid":{"rendered":""},"modified":"2025-10-24T11:55:21","modified_gmt":"2025-10-24T17:55:21","slug":"cve-2025-53499-critical-unauthorized-access-vulnerability-in-wikimedia-foundation-mediawiki-abusefilter-extension","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53499-critical-unauthorized-access-vulnerability-in-wikimedia-foundation-mediawiki-abusefilter-extension\/","title":{"rendered":"<strong>CVE-2025-53499: Critical Unauthorized Access Vulnerability in Wikimedia Foundation Mediawiki &#8211; AbuseFilter Extension<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the rapidly evolving realm of cybersecurity, vulnerabilities that allow unauthorized access pose a significant threat to the integrity of systems and data. The recent discovery of CVE-2025-53499, a Missing Authorization vulnerability in Wikimedia Foundation&#8217;s Mediawiki &#8211; AbuseFilter Extension, emphasizes this ongoing issue. This vulnerability, which affects versions 1.43.X before 1.43.2 of the AbuseFilter Extension, can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7419-critical-vulnerability-discovered-in-tenda-o3v2-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"68825\">potentially lead to system<\/a> compromise and data leakage. Given the wide usage and influence of Mediawiki, this issue has widespread implications and deserves immediate attention.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-53499<br \/>\nSeverity: Critical (9.1 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54378-unauthorized-access-vulnerability-in-hax-cms\/\"  data-wpil-monitor-id=\"68847\">Unauthorized Access<\/a>, Potential System Compromise and Data Leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1858614983\" 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><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53495-unauthorized-access-data-leakage-in-wikimedia-foundation-mediawiki-abusefilter-extension\/\"  data-wpil-monitor-id=\"72445\">Mediawiki &#8211; AbuseFilter<\/a> 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-2025-52448-critical-authorization-bypass-vulnerability-in-salesforce-tableau-server\/\"  data-wpil-monitor-id=\"68824\">vulnerability stems from a flaw in the authorization<\/a> mechanism of the AbuseFilter Extension. An <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42959-unauthenticated-replay-attack-exploiting-hmac-reuse\/\"  data-wpil-monitor-id=\"72446\">attacker can exploit<\/a> this flaw by sending specially crafted requests to the affected system. The system fails to properly authenticate these requests, providing the attacker with <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5835-droip-plugin-for-wordpress-unauthorized-access-and-modification-vulnerability\/\"  data-wpil-monitor-id=\"68943\">unauthorized access<\/a>. From here, the attacker could potentially compromise the system or exfiltrate <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43233-critical-https-proxy-vulnerability-allowing-sensitive-data-access\/\"  data-wpil-monitor-id=\"69344\">sensitive data<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-800244672\" 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>Consider the following<br \/>\n<strong>conceptual<\/strong><br \/>\n example of how the vulnerability might be exploited. In this example, an HTTP request is made that takes advantage of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8322-critical-missing-authorization-vulnerability-in-e-school-software-by-ventem\/\"  data-wpil-monitor-id=\"70273\">missing authorization vulnerability<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/abusefilter\/modify HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n&quot;filter_id&quot;: &quot;1&quot;,\n&quot;actions&quot;: { &quot;type&quot;: &quot;modify&quot;, &quot;parameters&quot;: [&quot;new data&quot;] },\n&quot;token&quot;: &quot;bypass_token&quot;\n}<\/code><\/pre>\n<p>In this minimalist example, the attacker sends a request to modify an AbuseFilter, using a bypass token instead of a legitimate session token. The system fails to properly authenticate the request, allowing the attacker to modify the filter and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7837-critical-vulnerability-in-totolink-t6-potentially-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"71057\">potentially impact the integrity of the system<\/a>.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The issue can be mitigated by applying the vendor-supplied patch. Users of affected versions should update to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53369-mediawiki-short-description-extension-vulnerability\/\"  data-wpil-monitor-id=\"91420\">Mediawiki &#8211; AbuseFilter Extension<\/a> 1.43.2 or later. If immediate patching is not possible, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-36600-dell-bios-improper-access-control-vulnerability-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"70274\">systems can help detect and block potentially<\/a> malicious traffic, preventing exploitation of the vulnerability.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the rapidly evolving realm of cybersecurity, vulnerabilities that allow unauthorized access pose a significant threat to the integrity of systems and data. The recent discovery of CVE-2025-53499, a Missing Authorization vulnerability in Wikimedia Foundation&#8217;s Mediawiki &#8211; AbuseFilter Extension, emphasizes this ongoing issue. This vulnerability, which affects versions 1.43.X before 1.43.2 of the AbuseFilter [&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-59374","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\/59374","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=59374"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59374\/revisions"}],"predecessor-version":[{"id":84527,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59374\/revisions\/84527"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59374"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59374"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59374"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59374"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59374"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59374"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}