CVE-2015-6728: Mediawiki

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

The ApiBase::getWatchlistUser function in MediaWiki before 1.23.10, 1.24.x before 1.24.3, and 1.25.x before 1.25.2 does not perform token comparison in constant time, which allows remote attackers to guess the watchlist token and bypass CSRF protection via a timing attack.

Affected products

• Mediawiki Mediawiki: up to and including 1.23.9; version 1.24.0 only; version 1.24.1 only; version 1.24.2 only; version 1.25.0 only; version 1.25.1 only

Published 2015-09-01. Last modified 2026-06-17.