CVE-2025-6594: Wikimedia Foundation Mediawiki

Medium severity, CVSS 4.7. 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.Special.Apisandbox/ApiSandbox.Js. This issue affects MediaWiki: from 1.27.0 before 1.39.13, 1.42.7 1.43.2, 1.44.0.

Affected products

• Wikimedia Foundation Mediawiki

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