{"id":"UBUNTU-CVE-2015-8624","details":"The User::matchEditToken function in includes/User.php in MediaWiki before 1.23.12, 1.24.x before 1.24.5, 1.25.x before 1.25.4, and 1.26.x before 1.26.1 does not perform token comparison in constant time before determining if a debugging message should be logged, which allows remote attackers to guess the edit token and bypass CSRF protection via a timing attack, a different vulnerability than CVE-2015-8623.","modified":"2025-07-16T07:33:35.032174Z","published":"2017-03-23T20:59:00Z","withdrawn":"2025-07-18T16:43:19Z","upstream":["CVE-2015-8624"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-8624"},{"type":"REPORT","url":"https://phabricator.wikimedia.org/T119309"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-8624"}],"affected":[{"package":{"name":"mediawiki","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mediawiki@1:1.27.4-3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.27.4-3"}]}],"versions":["1:1.27.3-1","1:1.27.4-1","1:1.27.4-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.27.4-3","binary_name":"mediawiki"},{"binary_version":"1:1.27.4-3","binary_name":"mediawiki-classes"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-8624.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}