CVE-2024-23171: Mediawiki

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in the CampaignEvents extension in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. The Special:EventDetails page allows XSS via the x-xss language setting for internationalization (i18n).

Affected products

• Mediawiki Mediawiki: before 1.35.14 (fixed in 1.35.14); from 1.36.0, before 1.39.6 (fixed in 1.39.6); from 1.40.0, before 1.40.2 (fixed in 1.40.2)

Published 2024-01-12. Last modified 2026-06-17.