CVE-2021-31550

EUVD-2021-18447
An issue was discovered in the CommentBox extension for MediaWiki through 1.35.2. Via crafted configuration variables, a malicious actor could introduce XSS payloads into various layers.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 44%
Affected Products (NVD)
VendorProductVersion
mediawikimediawiki
𝑥
≤ 1.35.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Commentbox/+/651934/
https://phabricator.wikimedia.org/T270767
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Commentbox/+/651934/
https://phabricator.wikimedia.org/T270767