CVE-2021-44857: Medium severity mediawiki vulnerability
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 Software
Event History
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.