CVE-2015-8623

The User::matchEditToken function in includes/User.php in MediaWiki before 1.23.12 and 1.24.x before 1.24.5 does not perform token comparison in constant time before returning, which allows remote attackers to guess the edit token and bypass CSRF protection via a timing attack, a different vulnerability than CVE-2015-8624.

• CWE-352

• http://www.openwall.com/lists/oss-security/2015/12/21/8Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2015/12/23/7Mailing List, Patch, Third Party Advisory
• https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.phpIssue Tracking, Third Party Advisory
• https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.htmlPatch, Release Notes, Vendor Advisory
• https://phabricator.wikimedia.org/T119309Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2015/12/21/8Mailing List, Patch, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2015/12/23/7Mailing List, Patch, Third Party Advisory
• https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.phpIssue Tracking, Third Party Advisory
• https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.htmlPatch, Release Notes, Vendor Advisory
• https://phabricator.wikimedia.org/T119309Patch, Third Party Advisory

Published

Mar 23, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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