What’s Vulnerable › Vulnerabilities

CVE-2011-4361

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-01-08 · updated 2026-06-16
• Weakness: CWE-276

Description

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 Linux: 5.0, 6.0
• Wikimedia Foundation MediaWiki: before 1.17.1 — fixed in 1.17.1

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.17.1. Check the vendor advisory for mitigations.

References

• http://lists.wikimedia.org/pipermail/mediawiki-announce/2011-November/000104.html
• http://openwall.com/lists/oss-security/2011/11/29/12
• http://openwall.com/lists/oss-security/2011/11/29/6
• http://www.debian.org/security/2011/dsa-2366
• https://bugzilla.redhat.com/show_bug.cgi?id=758171
• https://bugzilla.wikimedia.org/show_bug.cgi?id=32616
• http://lists.wikimedia.org/pipermail/mediawiki-announce/2011-November/000104.html
• http://openwall.com/lists/oss-security/2011/11/29/12
• http://openwall.com/lists/oss-security/2011/11/29/6
• http://www.debian.org/security/2011/dsa-2366
• https://bugzilla.redhat.com/show_bug.cgi?id=758171
• https://bugzilla.wikimedia.org/show_bug.cgi?id=32616

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