CVE-2021-44854

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-26 · updated 2026-06-17
Weakness: CWE-524

Description

An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. The REST API publicly caches results from private wikis.

Affected products

Wikimedia Foundation MediaWiki: before 1.35.5; from 1.36.0 before 1.36.3; 1.37.0, 1.37.0-rc0, 1.37.0-rc1, 1.37.0-rc2 — fixed in 1.35.5, 1.36.3

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.35.5, 1.36.3. Check the vendor advisory for mitigations.

References

https://phabricator.wikimedia.org/T292763
https://security.gentoo.org/glsa/202305-24
https://phabricator.wikimedia.org/T292763
https://security.gentoo.org/glsa/202305-24

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