CVE-2021-36131: Mediawiki

Medium severity, CVSS 4.8. EPSS: 0.4% chance of exploitation in the next 30 days.

An XSS issue was discovered in the SportsTeams extension in MediaWiki through 1.36. Within several special pages, a privileged user could inject arbitrary HTML and JavaScript within various data fields. The attack could easily propagate across many pages for many users.

Affected products

• Mediawiki Mediawiki: up to and including 1.36

Published 2021-07-02. Last modified 2026-06-17.