CVE-2020-15005: Debian Linux

Low severity, CVSS 3.1. EPSS: 1.3% chance of exploitation in the next 30 days.

In MediaWiki before 1.31.8, 1.32.x and 1.33.x before 1.33.4, and 1.34.x before 1.34.2, private wikis behind a caching server using the img_auth.php image authorization security feature may have had their files cached publicly, so any unauthorized user could view them. This occurs because Cache-Control and Vary headers were mishandled.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 32 only
• Mediawiki Mediawiki: before 1.31.8 (fixed in 1.31.8); from 1.32.0, before 1.33.4 (fixed in 1.33.4); from 1.34, before 1.34.2 (fixed in 1.34.2)

Published 2020-06-24. Last modified 2026-06-17.