Description
The CentralAuth extension for MediaWiki 1.19.x before 1.19.8, 1.20.x before 1.20.7, and 1.21.x before 1.21.2 caches a valid CentralAuthUser object in the centralauth_User cookie even when a user has not successfully logged in, which allows remote attackers to bypass authentication without a password.
References
- [oss-security] 20130904 Re: CVE request: MediaWiki Security Release: 1.21.2, 1.20.7 and 1.19.8 mailing-list
- mediawiki-cve20134304-security-bypass(86894) vdb-entry
- [MediaWiki-announce] 20130903 MediaWiki Security Release: 1.21.2, 1.20.7 and 1.19.8 mailing-list
- https://bugzilla.wikimedia.org/show_bug.cgi?id=52338
- 96910 vdb-entry
- 54723 third-party-advisory