CVE-2021-42043: Mediawiki

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue was discovered in Special:MediaSearch in the MediaSearch extension in MediaWiki through 1.36.2. The suggestion text (a parameter to mediasearch-did-you-mean) was not being properly sanitized and allowed for the injection and execution of HTML and JavaScript via the intitle: search operator within the query.

Affected products

• Mediawiki Mediawiki: up to and including 1.36.2

Published 2021-10-06. Last modified 2026-06-17.