{"id":59538,"date":"2025-07-21T12:21:58","date_gmt":"2025-07-21T12:21:58","guid":{"rendered":""},"modified":"2025-10-21T05:20:52","modified_gmt":"2025-10-21T11:20:52","slug":"cve-2025-53835-critical-xss-vulnerability-discovered-in-xwiki-rendering-system","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53835-critical-xss-vulnerability-discovered-in-xwiki-rendering-system\/","title":{"rendered":"CVE-2025-53835: Critical XSS Vulnerability Discovered in XWiki Rendering System<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

A serious Cross-Site Scripting (XSS) vulnerability, identified as CVE-2025-53835, has been discovered in the XWiki Rendering system. This vulnerability affects versions 5.4.5 to prior to version 14.10. The vulnerability leverages the `xdom+xml\/current` syntax, which allows the insertion of arbitrary HTML content, including JavaScript, leading to potential<\/a> XSS attacks. The users most affected are those with editing rights, including the ability to modify their user profile<\/a>. The severity of this vulnerability<\/a> underscores the need for immediate attention and remediation, as potential exploitation could lead to significant system compromise or data leakage.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-53835
\nSeverity: Critical (CVSS: 9.0)
\nAttack Vector: Web-based (HTTP\/HTTPS)
\nPrivileges Required: Low (User interaction)
\nUser Interaction: Required
\nImpact: Potential system<\/a> compromise and data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

XWiki Rendering | 5.4.5 to 14.9<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The CVE-2025-53835 vulnerability stems from the ability to create raw blocks through the `xdom+xml\/current` syntax in the XWiki Rendering<\/a> system. This syntax allows the introduction of arbitrary HTML<\/a> content, including JavaScript. By inserting malicious scripts, an attacker could perform an XSS attack, leading to unauthorized<\/a> access, data leakage, or even system compromise.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Below is a conceptual example demonstrating how this vulnerability might be exploited. This example leverages a malicious script embedded within a user profile<\/a> edit request.<\/p>\n

POST \/user\/profile\/edit HTTP\/1.1\nHost: target.example.com\nContent-Type: text\/html\n{ \"<script>malicious_code_here<\/script>\" }<\/code><\/pre>\n
When a user views the edited profile, the malicious script is executed, potentially leading to unauthorized access or data<\/a> leakage.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
The recommended mitigation for CVE-2025-53835 is to upgrade the XWiki Rendering system to version<\/a> 14.10 or later, which removes the dependency on the `xdom+xml\/current` syntax from the XHTML syntax. In the absence of an immediate upgrade, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. Furthermore, the `xdom+xml` syntax, which remains vulnerable, should not be installed or used on a regular wiki due to the associated risks.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A serious Cross-Site Scripting (XSS) vulnerability, identified as CVE-2025-53835, has been discovered in the XWiki Rendering system. This vulnerability affects versions 5.4.5 to prior to version 14.10. The vulnerability leverages the `xdom+xml\/current` syntax, which allows the insertion of arbitrary HTML content, including JavaScript, leading to potential XSS attacks. The users most affected are those […]<\/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,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[81],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-59538","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-xss"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t