CVE-2021-44856 Security feature bypass in n/a
Attackers can bypass AbuseFilter restrictions to create blocked titles via Special:ChangeContentModel in MediaWiki.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-44856?
CVE-2021-44856 is a medium-severity vulnerability in Mediawiki Mediawiki, published on 26 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-754
Which versions are affected by CVE-2021-44856?
1 open source package ship an affected version, including mediawiki. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mediawiki Bitnami | All versions | 1.35.5, 1.36.3, 1.37.1 |
Products include Mediawiki Mediawiki.
How do I fix CVE-2021-44856?
Upgrade mediawiki to a fixed version for your release line: 1.35.5, 1.36.3 or 1.37.1.
Is CVE-2021-44856 being exploited?
There is no known exploitation of CVE-2021-44856 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-44856, DEBIAN-CVE-2021-44856, GHSA-gmch-57w2-pj7q, UBUNTU-CVE-2021-44856.