CVE-2011-4361: Debian Linux

Medium severity, CVSS 5.0. EPSS: 2.2% chance of exploitation in the next 30 days.

MediaWiki before 1.17.1 does not check for read permission before handling action=ajax requests, which allows remote attackers to obtain sensitive information by (1) leveraging the SpecialUpload::ajaxGetExistsWarning function, or by (2) leveraging an extension, as demonstrated by the CategoryTree, ExtTab, and InlineEditor extensions.

Affected products

• Debian Debian Linux: version 5.0 only; version 6.0 only
• Mediawiki Mediawiki: before 1.17.1 (fixed in 1.17.1)

Published 2012-01-08. Last modified 2026-06-16.