{"id":59016,"date":"2025-07-10T22:30:24","date_gmt":"2025-07-10T22:30:24","guid":{"rendered":""},"modified":"2025-10-24T11:55:22","modified_gmt":"2025-10-24T17:55:22","slug":"cve-2025-53370-arbitrary-html-insertion-vulnerability-in-citizen-mediawiki-skin","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53370-arbitrary-html-insertion-vulnerability-in-citizen-mediawiki-skin\/","title":{"rendered":"<strong>CVE-2025-53370: Arbitrary HTML Insertion Vulnerability in Citizen MediaWiki Skin<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Citizen MediaWiki skin, an extension that enhances the visual experience of MediaWiki users, has recently been identified with a significant vulnerability. This security flaw, designated CVE-2025-53370, exposes systems to potential compromise and data leakage. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46198-cross-site-scripting-vulnerability-in-grav-versions-1-7-46-to-1-7-48\/\"  data-wpil-monitor-id=\"69902\">vulnerability affects versions<\/a> 1.9.4 to 3.4.0 of the Citizen skin, and is a matter of grave concern for any organization or individual using this particular skin for their MediaWiki sites. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49267-serious-sql-injection-vulnerability-in-shabti-kaplan-frontend-admin-by-dynamiapps\/\"  data-wpil-monitor-id=\"77170\">vulnerability has serious<\/a> implications, making it a high priority issue that should be addressed immediately by all users.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-53370<br \/>\nSeverity: High (8.6)<br \/>\nAttack Vector: Web-based<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<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=\"65743\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3766629773\" 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-2025-53368-critical-xss-vulnerability-in-mediawiki-citizen-skin\/\"  data-wpil-monitor-id=\"91418\">Citizen MediaWiki<\/a> Skin | 1.9.4 to 3.4.0<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of a flaw in the Citizen MediaWiki skin. The skin, when used with the ShortDescription extension, inserts <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53369-mediawiki-short-description-extension-vulnerability\/\"  data-wpil-monitor-id=\"91422\">short descriptions<\/a> as raw HTML. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50738-memos-application-vulnerability-allows-for-unauthorized-user-information-disclosure\/\"  data-wpil-monitor-id=\"69903\">allows any user<\/a> to insert arbitrary HTML into the Document Object Model (DOM) of a page by simply editing it. This could allow an attacker to inject malicious scripts, which could lead to system compromise or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53495-unauthorized-access-data-leakage-in-wikimedia-foundation-mediawiki-abusefilter-extension\/\"  data-wpil-monitor-id=\"72540\">data leakage<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-552491362\" 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>Here is a conceptual example of how the vulnerability might be exploited:<\/p>\n<pre><code class=\"\" data-line=\"\">&lt;!-- This is a simple example of how an attacker might inject malicious code --&gt;\n&lt;!-- The attacker edits a page&#039;s short description and adds a script tag with malicious JavaScript --&gt;\n&lt;!-- This script gets executed when the page is loaded --&gt;\nSHORT_DESCRIPTION = &quot;&lt;script&gt;malicious_code();&lt;\/script&gt;&quot;<\/code><\/pre>\n<p>The malicious code could perform a variety of harmful actions, such as stealing <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43233-critical-https-proxy-vulnerability-allowing-sensitive-data-access\/\"  data-wpil-monitor-id=\"69904\">sensitive data<\/a> or taking control of the user&#8217;s session.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>A patch for this vulnerability has been released in version 3.4.0 of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53093-critical-security-vulnerability-in-tabberneue-mediawiki-extension\/\"  data-wpil-monitor-id=\"65700\">Citizen MediaWiki<\/a> Skin. All users are strongly urged to apply this patch immediately. If immediate patching is not possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer temporary mitigation by detecting and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8059-critical-privilege-escalation-vulnerability-in-b-blocks-wordpress-plugin\/\"  data-wpil-monitor-id=\"76432\">blocking attempts to exploit this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Citizen MediaWiki skin, an extension that enhances the visual experience of MediaWiki users, has recently been identified with a significant vulnerability. This security flaw, designated CVE-2025-53370, exposes systems to potential compromise and data leakage. The vulnerability affects versions 1.9.4 to 3.4.0 of the Citizen skin, and is a matter of grave concern for [&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-59016","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\/59016","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=59016"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59016\/revisions"}],"predecessor-version":[{"id":84529,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59016\/revisions\/84529"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59016"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59016"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59016"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59016"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59016"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59016"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}