CVE-2021-44857
MEDIUM6.5EPSS 0.15%mediawiki - security update
Published: 12/17/2021Modified: 4/28/2026
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. It is possible to use action=mcrundo followed by action=mcrrestore to replace the content of any arbitrary page (that the user doesn't have edit rights for). This applies to any public wiki, or a private wiki that has at least one page set in $wgWhitelistRead.
Affected packages (3)
- Bitnami/mediawikifrom 0, < 1.35.5, >= 1.36.0, < 1.36.3, >= 1.37.0, < 1.37.1
- Debian/mediawikifrom 0, < 1:1.35.4-1+deb11u2
- Debian/mediawikifrom 0, < 1:1.35.4-1+deb11u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |