CVE-2016-6333: Mediawiki

Medium severity, CVSS 6.1. EPSS: 1% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the CSS user subpage preview feature in MediaWiki before 1.23.15, 1.26.x before 1.26.4, and 1.27.x before 1.27.1 allows remote attackers to inject arbitrary web script or HTML via the edit box in Special:MyPage/common.css.

Affected products

• Mediawiki Mediawiki: up to and including 1.23.14; version 1.26.0 only; version 1.26.1 only; version 1.26.2 only; version 1.26.3 only; version 1.26.4 only; …

Published 2017-04-20. Last modified 2026-06-17.