CVE-2015-2937: Mediawiki

High severity, CVSS 7.1. EPSS: 2.7% chance of exploitation in the next 30 days.

MediaWiki before 1.19.24, 1.2x before 1.23.9, and 1.24.x before 1.24.2, when using HHVM or Zend PHP, allows remote attackers to cause a denial of service ("quadratic blowup" and memory consumption) via an XML file containing an entity declaration with long replacement text and many references to this entity, a different vulnerability than CVE-2015-2942.

Affected products

• Mediawiki Mediawiki: up to and including 1.19.23; version 1.20 only; version 1.20.1 only; version 1.20.2 only; version 1.20.3 only; version 1.20.4 only; …

Published 2015-04-13. Last modified 2026-06-17.