CVE-2021-31549

MEDIUM

MediaWiki < 1.35.2 - Exposure of Suppressed Usernames via AbuseFilter Examine Form

Title source: llm
STIX 2.1

Description

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.

References (3)

Core 3
Core References
Third Party Advisory x_refsource_misc
https://phabricator.wikimedia.org/T274152
Issue Tracking, Vendor Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/q/I6063c02fa261c4cc0e6dbbb2db4e111eb85912c2
Issue Tracking, Vendor Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/q/I71a6d521bd12931ce60eec4d2dc35af19146000f

Scores

CVSS v3 4.3
EPSS 0.0018
EPSS Percentile 38.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Details

CWE
CWE-200
Status published
Products (1)
mediawiki/mediawiki < 1.35.2
Published Apr 22, 2021
Tracked Since Feb 18, 2026