CVE-2021-44856
mediawiki - security update
5.3
MEDIUM
CVSS 3.1
EPSS 0.17%
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.
How to fix CVE-2021-44856
To remediate CVE-2021-44856, upgrade the affected package to a fixed version below.
- Bitnami/mediawiki—upgrade to 1.35.5 or later
- —upgrade to 1:1.35.8-1~deb11u1 or later
- —upgrade to 1:1.31.16-1+deb10u3 or later
Is CVE-2021-44856 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 1.35.5, >= 1.36.0, < 1.36.3, >= 1.37.0, < 1.37.1
- from 0, < 1:1.35.8-1~deb11u1
- from 0, < 1:1.31.16-1+deb10u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |