CVE-2015-8623

high

Description

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.

References

Advisories
More

https://phabricator.wikimedia.org/T119309

https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.php

http://www.openwall.com/lists/oss-security/2015/12/23/7

http://www.openwall.com/lists/oss-security/2015/12/21/8

https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.html

Details

Source: Mitre, NVD

Published: 2017-03-23

Updated: 2025-04-20

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00128