Medium severity · published Sep 1, 2021
CVE-2021-39186
GlobalNewFiles is a MediaWiki extension maintained by Miraheze
6.1
CVSS
1%
EPSS
No
On KEV
Description
GlobalNewFiles is a MediaWiki extension maintained by Miraheze. Prior to commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d, the username column of the GlobalNewFiles special page is vulnerable to a stored XSS. Commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d contains a patch. As a workaround, one may disallow <,> (or other characters required to insert html/js) from being used in account names so an XSS is not possible.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GL
Globalnewfiles · Miraheze
before 2021-09-01 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39186
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-39186
Patch
https://github.com/miraheze/GlobalNewFiles/commit/cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d
Third Party Advisory
https://github.com/miraheze/GlobalNewFiles/security/advisories/GHSA-57p5-hqjq-h7vg
Exploit
https://phabricator.miraheze.org/T7935
More from Globalnewfiles
6.5
CVE-2021-32722
GlobalNewFiles is a mediawiki extension