High severity · published Dec 20, 2021
CVE-2021-44858
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
7.5
CVSS
1.4%
EPSS
No
On KEV
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=edit&undo= followed by action=mcrundo and action=mcrrestore to view private pages on a private wiki that has at least one page set in $wgWhitelistRead.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Mediawiki · Mediawiki
before 1.35.5; 1.36.0 before 1.36.3; 1.37.0 before 1.37.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-44858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-44858
Patch
https://phabricator.wikimedia.org/T297322
security.gentoo.org
https://security.gentoo.org/glsa/202305-24
Mitigation
https://www.mediawiki.org/wiki/2021-12_security_release/FAQ
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