CVE-2021-31554

MEDIUM

MediaWiki < 1.35.2 - Incorrect Authorization in AbuseFilter Extension

Title source: llm

Description

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. It improperly handled account blocks for certain automatically created MediaWiki user accounts, thus allowing nefarious users to remain unblocked.

References (2)

Core 2

Core References

Third Party Advisory x_refsource_misc

https://phabricator.wikimedia.org/T272244

Issue Tracking, Vendor Advisory x_refsource_misc

https://gerrit.wikimedia.org/r/q/Ie1f4333d5b1c9d17fb2236fe38a31de427a4cc48

Scores

CVSS v3 5.4

EPSS 0.0009

EPSS Percentile 25.7%

Attack Vector NETWORK

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

Details

CWE

CWE-863

Status published

Products (1)

mediawiki/mediawiki < 1.35.2

Published Apr 22, 2021

Tracked Since Feb 18, 2026