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CVE-2021-44856

Date: December 25, 2022

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.

Language: PHP

Severity Score

Related Resources (8)

https://nvd.nist.gov/vuln/detail/CVE-2021-44856
https://security-tracker.debian.org/tracker/CVE-2021-44856
https://phabricator.wikimedia.org/T271037
https://github.com/wikimedia/mediawiki/commit/275dec4f18007406404507e18cfa0dab4b6e76d6
https://security.gentoo.org/glsa/202305-24
https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/QEN3EK4JXAVJMJ5GF3GYOAKNJPEKFQYA/
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-44856
https://www.mend.io/vulnerability-database/CVE-2021-44856

Severity Score

Weakness Type (CWE)

Improper Check for Unusual or Exceptional Conditions

CWE-754

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

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