kbrain

CVE-2011-1766

MEDIUM · CVSS 5.8EPSS 2.2%EU EUVD

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.

Key facts

CVSS score
5.8 (v2.0)
Severity
MEDIUM
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:N
Weakness (CWE)
CWE-287
EPSS score
2.2% (83th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2011-1765)
Published
May 23, 2011
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1765 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki
  • mediawiki / mediawiki

and 87 more…

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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