Medium severity · published Oct 6, 2021
CVE-2021-42048
An issue was discovered in the Growth extension in MediaWiki through 1.36.2
4.8
CVSS
0.7%
EPSS
No
On KEV
Description
An issue was discovered in the Growth extension in MediaWiki through 1.36.2. Any admin can add arbitrary JavaScript code to the Newcomer home page footer, which can be executed by viewers with zero edits.
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)0.7% · 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
through 1.36.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42048
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-42048
Patch
https://gerrit.wikimedia.org/r/q/Iaa90a8976834d70caad592e9d1b18510318db537
Patch
https://phabricator.wikimedia.org/T289064
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