CVE-2020-27957: Mediawiki

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

The RandomGameUnit extension for MediaWiki through 1.35 was not properly escaping various title-related data. When certain varieties of games were created within MediaWiki, their names or titles could be manipulated to generate stored XSS within the RandomGameUnit extension.

Affected products

• Mediawiki Mediawiki: up to and including 1.35

Published 2020-10-28. Last modified 2026-06-17.