What’s Vulnerable › Vulnerabilities

CVE-2015-8624

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-03-23 · updated 2026-06-17
• Weakness: CWE-352

Description

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.

Affected products

• Wikimedia Foundation MediaWiki: through 1.23.11; 1.24.0, 1.24.1, 1.24.2, 1.24.3, 1.24.4, 1.25.0 (+4)

References

• http://www.openwall.com/lists/oss-security/2015/12/21/8
• http://www.openwall.com/lists/oss-security/2015/12/23/7
• https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.html
• https://phabricator.wikimedia.org/T119309
• http://www.openwall.com/lists/oss-security/2015/12/21/8
• http://www.openwall.com/lists/oss-security/2015/12/23/7
• https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.html
• https://phabricator.wikimedia.org/T119309

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