CVE-2012-1582: Mediawiki

Medium severity, CVSS 4.3. EPSS: 2.4% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the wikitext parser in MediaWiki 1.17.x before 1.17.3 and 1.18.x before 1.18.2 allows remote attackers to inject arbitrary web script or HTML via a crafted page with "forged strip item markers," as demonstrated using the CharInsert extension.

Affected products

• Mediawiki Mediawiki: version 1.17 only; version 1.17.0 only; version 1.17.1 only; version 1.17.2 only; version 1.18 only; version 1.18.0 only; …

Published 2012-09-09. Last modified 2026-06-16.