CVE-2021-31545

MEDIUM

MediaWiki < 1.35.2 - Exposure of Deleted Usernames via AbuseFilter page_recent_contributors

Title source: llm
STIX 2.1

Description

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted.

References (2)

Core 2
Core References
Third Party Advisory x_refsource_misc
https://phabricator.wikimedia.org/T71367
Issue Tracking, Vendor Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/q/I8d5ed9ca84282ee50832035af86123633fc88293

Scores

CVSS v3 5.3
EPSS 0.0020
EPSS Percentile 41.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/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