CVE-2020-25812: Fedoraproject Fedora

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in MediaWiki 1.34.x before 1.34.4. On Special:Contributions, the NS filter uses unescaped messages as keys in the option key for an HTMLForm specifier. This is vulnerable to a mild XSS if one of those messages is changed to include raw HTML.

Affected products

• Fedoraproject Fedora: version 33 only
• Mediawiki Mediawiki: from 1.34.0, before 1.34.4 (fixed in 1.34.4)

Published 2020-09-27. Last modified 2026-06-17.