Vulnerability CVE-2021-31550
Published: 2021-04-22

Description:
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.

Type:

CWE-79

 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Mediawiki -> Mediawiki 

 References:
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Commentbox/+/651934/
https://phabricator.wikimedia.org/T270767
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