Name: CVE-2021-44856: Improper Check for Unusual or Exceptional Conditions
Creator: Rapid7
Published: 2022-12-26T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-44856, CWE-754, CVSS 5.3, EPSS 0.00506

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. A title blocked by AbuseFilter can be created via Special:ChangeContentModel due to the mishandling of the EditFilterMergedContent hook return value.

CVSS Details

CVSS 3.1 Base Score: 5.3
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Arch Linux	—	Upgrade to the latest version of Arch Linux	Jul 11, 2025	Dec 26, 2022
Debian	—	Upgrade mediawiki	Sep 26, 2022	Sep 26, 2022
Freebsd	—	Upgrade mediawiki135Upgrade mediawiki137Upgrade mediawiki136	Nov 4, 2022	Dec 21, 2021
Gentoo Linux	—	Upgrade www-apps/mediawiki.	May 23, 2023	Dec 26, 2022
Mediawiki	—	Upgrade MediaWiki to the latest version	Jan 6, 2023	Dec 26, 2022

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CVSS Details

Covered by Rapid7

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