CVE-2021-44856

5.3 mediumEPSS 0.5%

Medium (5.3) in mediawiki mediawiki. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
CWE: CWE-754
Published: 2022-12-26
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mediawiki:mediawiki

References

https://phabricator.wikimedia.org/T271037
https://security.gentoo.org/glsa/202305-24
https://phabricator.wikimedia.org/T271037
https://security.gentoo.org/glsa/202305-24

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