What is the severity of CVE-2021-44856?

The severity of CVE-2021-44856 is medium with a CVSS score of 5.3.

How can I exploit CVE-2021-44856?

We do not provide information on how to exploit vulnerabilities.

How do I check if my version of MediaWiki is affected by CVE-2021-44856?

You can check if your version of MediaWiki is affected by CVE-2021-44856 by referring to the affected software list in the vulnerability description.

How do I fix CVE-2021-44856?

To fix CVE-2021-44856, update your MediaWiki installation to version 1.35.5, 1.36.3, or 1.37.1.

Where can I find more information about CVE-2021-44856?

You can find more information about CVE-2021-44856 in the references provided: [Phabricator](https://phabricator.wikimedia.org/T271037), [Wikitech-l Mailing List](https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/QEN3EK4JXAVJMJ5GF3GYOAKNJPEKFQYA/), [Debian Security Tracker](https://security-tracker.debian.org/tracker/CVE-2021-44856).

Vulnerability/
CVE-2021-44856

medium

5.3

CWE

754

26/12/2022

21/5/2023

CVE-2021-44856

First published: Mon Dec 26 2022(Updated: )

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.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
debian/mediawiki	<=1:1.31.16-1+deb10u2	1:1.31.16-1+deb10u6 1:1.35.11-1~deb11u1 1:1.35.13-1~deb11u1 1:1.39.4-1~deb12u1 1:1.39.5-1~deb12u1 1:1.39.5-1
MediaWiki MediaWiki	<1.35.5
MediaWiki MediaWiki	>=1.36.0<1.36.3
MediaWiki MediaWiki	=1.37.0
MediaWiki MediaWiki	=1.37.0-rc0
MediaWiki MediaWiki	=1.37.0-rc1
MediaWiki MediaWiki	=1.37.0-rc2

Remedy

https://phabricator.wikimedia.org/T271037

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-44856?
The severity of CVE-2021-44856 is medium with a CVSS score of 5.3.
How can I exploit CVE-2021-44856?
We do not provide information on how to exploit vulnerabilities.
How do I check if my version of MediaWiki is affected by CVE-2021-44856?
You can check if your version of MediaWiki is affected by CVE-2021-44856 by referring to the affected software list in the vulnerability description.
How do I fix CVE-2021-44856?
To fix CVE-2021-44856, update your MediaWiki installation to version 1.35.5, 1.36.3, or 1.37.1.
Where can I find more information about CVE-2021-44856?
You can find more information about CVE-2021-44856 in the references provided: [Phabricator](https://phabricator.wikimedia.org/T271037), [Wikitech-l Mailing List](https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/QEN3EK4JXAVJMJ5GF3GYOAKNJPEKFQYA/), [Debian Security Tracker](https://security-tracker.debian.org/tracker/CVE-2021-44856).

collector/security-tracker-debian
agent/severity
agent/author
agent/type
agent/event
agent/weakness
agent/description
agent/remedy
agent/last-modified-date
agent/softwarecombine
agent/first-publish-date
agent/references
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
package-manager/debian
vendor/mediawiki
canonical/mediawiki mediawiki
version/mediawiki mediawiki/1.36.0
version/mediawiki mediawiki/1.37.0
version/mediawiki mediawiki/1.37.0-rc0
version/mediawiki mediawiki/1.37.0-rc1
version/mediawiki mediawiki/1.37.0-rc2

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