CVE-2025-11261: Mediawiki

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Language/mediawiki.Language.Js. This issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2.

Affected products

• Mediawiki Mediawiki: before 1.39.15 (fixed in 1.39.15); from 1.43.0, before 1.43.5 (fixed in 1.43.5); from 1.44.0, before 1.44.2 (fixed in 1.44.2)

Published 2026-02-03. Last modified 2026-06-17.