Medium severity · published Jan 10, 2022
CVE-2021-46150
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
4.8
CVSS
0.6%
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. Special:CheckUserLog allows CheckUser XSS because of date mishandling, as demonstrated by an XSS payload in MediaWiki:October.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% 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-2021-46150
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-46150
Third Party Advisory
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/CheckUser/+/79c2c49a18f96b159258958feca90fce964c350a
Exploit
https://phabricator.wikimedia.org/T292795
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