CVE-2021-31550

MEDIUM

MediaWiki CommentBox extension < 1.35.2 - Cross-Site Scripting via Crafted Configuration Variables

Title source: llm

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.

References (2)

Core 2

Core References

Third Party Advisory x_refsource_misc

https://phabricator.wikimedia.org/T270767

Issue Tracking, Vendor Advisory x_refsource_misc

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

Scores

CVSS v3 5.4

EPSS 0.0022

EPSS Percentile 44.4%

Attack Vector NETWORK

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

Details

CWE

CWE-79

Status published

Products (1)

mediawiki/mediawiki < 1.35.2

Published Apr 22, 2021

Tracked Since Feb 18, 2026