CVE-2012-4378: Mediawiki

Medium severity, CVSS 6.1. EPSS: 1.5% chance of exploitation in the next 30 days.

Multiple cross-site scripting (XSS) vulnerabilities in MediaWiki before 1.18.5 and 1.19.x before 1.19.2, when unspecified JavaScript gadgets are used, allow remote attackers to inject arbitrary web script or HTML via the userlang parameter to w/index.php.

Affected products

• Mediawiki Mediawiki: up to and including 1.18.4; version 1.19.0 only; version 1.19.1 only

Published 2017-10-26. Last modified 2026-06-16.