PT-2025-28632 · Mediawiki · Mediawiki

Dreamy_Jazz · Published 2025-07-08 · Updated 2025-07-09 · CVE-2025-53479

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: MediaWiki - CheckUser extension versions 1.39.X through 1.39.13 MediaWiki - CheckUser extension versions 1.42.X through 1.42.7 MediaWiki - CheckUser extension versions 1.43.X through 1.43.2

Description: The Special:CheckUser interface is susceptible to reflected Cross-Site Scripting (XSS) via the rev-deleted-user message. This message is processed without sufficient sanitization, enabling the injection of JavaScript code through the uselang=x-xss language override mechanism.

Recommendations: MediaWiki - CheckUser extension versions 1.39.X through 1.39.13: Update to version 1.39.14 or later. MediaWiki - CheckUser extension versions 1.42.X through 1.42.7: Update to version 1.42.8 or later. MediaWiki - CheckUser extension versions 1.43.X through 1.43.2: Update to version 1.43.3 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-53479

Affected Products

Mediawiki

References · 5

• 🔥 https://phabricator.wikimedia.org/T394693 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-53479 · Security Note
• https://twitter.com/CVEnew/status/1942658152018895153 · Twitter Post
• https://t.me/cvenotify/128160 · Telegram Post
• https://gerrit.wikimedia.org/r/q/I159e14543912cb3bc7f4a00c3090c0285b154786 · Note