CVE-2021-31547

MEDIUM

MediaWiki < 1.35.2 - Exposure of Sensitive Information via AbuseFilterCheckMatch API

Title source: llm
STIX 2.1

Description

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. Its AbuseFilterCheckMatch API reveals suppressed edits and usernames to unprivileged users through the iteration of crafted AbuseFilter rules.

References (3)

Core 3
Core References
Third Party Advisory x_refsource_misc
https://phabricator.wikimedia.org/T223654
Issue Tracking, Third Party Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/q/I3f7dbd8b873d411e37c8c3aac2339bf5ec36907d
Issue Tracking, Third Party Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/q/I4900b1be73323599d74e3164447f81eded094d75

Scores

CVSS v3 4.3
EPSS 0.0017
EPSS Percentile 37.8%
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