VulnerabilityModified
CVE-2021-31549
The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.
MEDIUM 4.3EPSS 0.80%
Does this matter?
Lower severity and a low EPSS score (0.80%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.80% probability · 56th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- mediawiki/mediawiki
- Source
- cve@mitre.org
EPSS 0.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://gerrit.wikimedia.org/r/q/I6063c02fa261c4cc0e6dbbb2db4e111eb85912c2Issue Tracking, Vendor Advisory
- https://gerrit.wikimedia.org/r/q/I71a6d521bd12931ce60eec4d2dc35af19146000fIssue Tracking, Vendor Advisory
- https://phabricator.wikimedia.org/T274152Third Party Advisory
- https://gerrit.wikimedia.org/r/q/I6063c02fa261c4cc0e6dbbb2db4e111eb85912c2Issue Tracking, Vendor Advisory
- https://gerrit.wikimedia.org/r/q/I71a6d521bd12931ce60eec4d2dc35af19146000fIssue Tracking, Vendor Advisory
- https://phabricator.wikimedia.org/T274152Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.