CVE-2015-2942: Mediawiki

High severity, CVSS 7.1. EPSS: 2.8% 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, allows remote attackers to cause a denial of service (CPU and memory consumption) via a large number of nested entity references in an (1) SVG file or (2) XMP metadata in a PDF file, aka a "billion laughs attack," a different vulnerability than CVE-2015-2937.

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.