Descriptionincludes/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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mediawiki (PTS)buster1:1.31.16-1+deb10u2fixed
buster (security)1:1.31.16-1+deb10u7fixed
bullseye (security)1:1.35.13-1+deb11u2fixed
bookworm (security)1:1.39.7-1~deb12u1fixed
sid, trixie1:1.39.7-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mediawikisourcelenny(not affected)
mediawikisourcesqueeze(not affected)
mediawikisource(unstable)(not affected)


- mediawiki <not-affected> (Vulnerable code not present, planned next upload will skip it)
[lenny] - mediawiki <not-affected> (Vulnerable code not present, introduced in 1.16.0)
[squeeze] - mediawiki <not-affected> (Vulnerable code not present, introduced in 1.16.0)

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