CVE-2021-44857
First published: Fri Dec 17 2021(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. 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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Wikimedia MediaWiki | <1.35.5 | |
| Wikimedia MediaWiki | >=1.36.0<1.36.3 | |
| Wikimedia MediaWiki | >=1.37.0<1.37.1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-44857?
CVE-2021-44857 is considered a high severity vulnerability due to its potential to allow unauthorized content manipulation.
How do I fix CVE-2021-44857?
To fix CVE-2021-44857, upgrade MediaWiki to version 1.35.5, 1.36.3, or 1.37.1 or later.
What types of MediaWiki versions are affected by CVE-2021-44857?
CVE-2021-44857 affects MediaWiki versions prior to 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1.
What kind of exploit is possible with CVE-2021-44857?
CVE-2021-44857 allows for the replacement of any arbitrary page content that the user does not have edit rights for.
Who is impacted by CVE-2021-44857?
Any user operating a public or private MediaWiki installation with versions prior to the patched versions is impacted by CVE-2021-44857.
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