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CVE-2011-1766

5.8 · MEDIUM

includes/User.php in MediaWiki before 1.16.5, when wgBlockDisablesLogin is enabled, does not clear certain cached data after verification of an auth token fails, which allows remote attackers to by…

Published May 23, 2011mediawikiCWE-287EPSS 2.23%

Overview

CVE-2011-1766 is a medium-severity vulnerability affecting mediawiki mediawiki. It was published on May 23, 2011 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

includes/User.php in MediaWiki before 1.16.5, when wgBlockDisablesLogin is enabled, does not clear certain cached data after verification of an auth token fails, which allows remote attackers to bypass authentication by creating crafted wikiUserID and wikiUserName cookies, or by leveraging an unattended workstation.

Remediation

Check the references section for vendor advisories and patches from mediawiki. Update mediawiki to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
mediawikimediawiki0Affected

References

Reflists.fedoraproject.org/pipermail/package-announce/2011-May/060435.htmlReflists.fedoraproject.org/pipermail/package-announce/2011-May/060496.htmlReflists.fedoraproject.org/pipermail/package-announce/2011-May/060507.htmlReflists.wikimedia.org/pipermail/mediawiki-announce/2011-May/000098.htmlRefsecunia.com/advisories/44684Refwww.securityfocus.com/bid/47722Refbugzilla.redhat.com/show_bug.cgi?id=702512Refbugzilla.wikimedia.org/show_bug.cgi?id=28639Reflists.fedoraproject.org/pipermail/package-announce/2011-May/060435.htmlReflists.fedoraproject.org/pipermail/package-announce/2011-May/060496.html

How CyberStrike helps

Frequently asked questions

What is CVE-2011-1766?

CVE-2011-1766 is a medium-severity vulnerability affecting mediawiki mediawiki. It was published on May 23, 2011 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

How severe is CVE-2011-1766?

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-1766?

Check the references section for vendor advisories and patches from mediawiki. Update mediawiki to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-1766?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-1766 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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