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CVE-2021-44856

MEDIUM
5.3
CVSS Score
Published: December 26, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:12 AM UTC
1 product affected across 1 vendorMediaWiki

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MediaWiki· Mediawiki
95%
v < 1.35.51.36.0 ≤ v < 1.36.31.37.01.37.0 rc01.37.0 rc11.37.0 rc2
Affected range stops below 1.35.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.36.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Issue TrackingPatchVendor Advisory
Source: [email protected]
https://phabricator.wikimedia.org/T271037
Vendor Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202305-24

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-754

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