CVE-2021-44857

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.11%
Vendor Advisory gentoo.org Vendor Advisory mediawiki.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://phabricator.wikimedia.org/T297322 third party advisory
https://www.mediawiki.org/wiki/2021-12_security_release/FAQ vendor advisory
https://security.gentoo.org/glsa/202305-24 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-44857?
CVE-2021-44857 has been scored as a medium severity vulnerability.
How to fix CVE-2021-44857?
To fix CVE-2021-44857, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-44857 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-44857 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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