Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2021-31549
CVE-2021-31549:
NixOS vulnerability analysis and mitigation
Overview
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 (NVD, CVE).
Technical details
The vulnerability exists in the Special:AbuseFilter/examine functionality where the form did not properly implement visibility checks for recentchanges queries. This allowed unprivileged users to view suppressed usernames by submitting the suppressed username in the user field of the form. The issue has a CVSS v3.1 Base Score of 4.3 MEDIUM (Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N) (NVD).
Impact
The vulnerability allows unauthorized disclosure of suppressed MediaWiki usernames, which are meant to be hidden from public view. This represents an information leak that could compromise user privacy protections (Phabricator).
Mitigation and workarounds
The issue has been patched in MediaWiki versions 1.31.13 and 1.35.2. The fix implements proper visibility checks for recentchanges queries and removes deleted rows from the /examine and /test interfaces (Phabricator).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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