CVE-2021-42047: Mediawiki

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

An issue was discovered in the Growth extension in MediaWiki through 1.36.2. On any Wiki with the Mentor Dashboard feature enabled, users can login with a mentor account and trigger an XSS payload (such as alert) via Growthexperiments-mentor-dashboard-mentee-overview-no-js-fallback.

Affected products

• Mediawiki Mediawiki: up to and including 1.36.2

Published 2022-09-29. Last modified 2026-06-17.