CVE-2020-15005 img_auth.php may leak private extension images into the public cache

What is CVE-2020-15005?

CVE-2020-15005 is a low-severity vulnerability in Debian Debian Linux, published on 24 Jun 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

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.

Which versions are affected by CVE-2020-15005?

7 open source packages ship an affected version, including mediawiki/core and mediawiki. It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Mediawiki Mediawiki.

How do I fix CVE-2020-15005?

Upgrade mediawiki/core to a fixed version for your release line: 1.31.8, 1.33.4 or 1.34.2.

Is CVE-2020-15005 being exploited?

There is no known exploitation of CVE-2020-15005 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-mediawiki-2020-15005, DEBIAN-CVE-2020-15005, GHSA-xpv7-93cm-4mxv, MGASA-2020-0292, UBUNTU-CVE-2020-15005.