CVE-2015-8624

Original summary

Normalized public record · Updated Nov 3, 2026

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.

Publisher and source text is retained separately from QFinch interpretation.

Affected products

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

1. Confirm the affected product and reachable code path exist in your environment.
2. Apply the vendor-supported patch or mitigation from the primary advisory.
3. Rescan the exact deployed revision and retain verification evidence.

Evidence coverage

SSVC priority

MEDIUM

Confidence

Not available

Aliases

None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

1. [MediaWiki-announce] 20151221 [MediaWiki-announce] Security Release: 1.26.1, 1.25.4, 1.24.5 and 1.23.12 ↗
2. [oss-security] 20151223 Re: CVE requests for MediaWiki 1.26.1, 1.25.4, 1.24.5 and 1.23.12 ↗
3. phabricator.wikimedia.org ↗
4. [oss-security] 20151221 CVE requests for MediaWiki 1.26.1, 1.25.4, 1.24.5 and 1.23.12 ↗

Record history

Published Mar 23, 2017 · Last refreshed Nov 3, 2026