CVE-2021-31550 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Reference

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4