CVE-2022-28203

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-09-19 · updated 2026-06-17
Weakness: CWE-763

Description

A denial-of-service issue was discovered in MediaWiki before 1.35.6, 1.36.x before 1.36.4, and 1.37.x before 1.37.2. When many files exist, requesting Special:NewFiles with actor as a condition can result in a very long running query.

Affected products

Debian Linux: 10.0, 11.0
Wikimedia Foundation MediaWiki: before 1.35.6; from 1.36.0 before 1.36.4; from 1.37.0 before 1.37.2 — fixed in 1.35.6, 1.36.4, 1.37.2

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.35.6, 1.36.4, 1.37.2. Check the vendor advisory for mitigations.

References

https://lists.debian.org/debian-lts-announce/2022/09/msg00027.html
https://phabricator.wikimedia.org/T297731
https://www.debian.org/security/2022/dsa-5246
https://lists.debian.org/debian-lts-announce/2022/09/msg00027.html
https://phabricator.wikimedia.org/T297731
https://www.debian.org/security/2022/dsa-5246

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