Vulnerability · Published Dec 17, 2021 · Assigned by mitre
CVE-2021-44857
Medium 6.5
In plain English
A medium-severity security flaw in the mediawiki package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.9%top 40.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
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. 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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mediawiki | 1:1.35.5-1 | DEBIAN-CVE-2021-44857 |
| Debian:13 | mediawiki | 1:1.35.5-1 | DEBIAN-CVE-2021-44857 |
| Debian:14 | mediawiki | 1:1.35.5-1 | DEBIAN-CVE-2021-44857 |
| Ubuntu:22.04:LTS | mediawiki | 1:1.35.5-1 | UBUNTU-CVE-2021-44857 |