CVE-2021-31546 json
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2.
published 2021-04-22 5 y ago modified 2026-06-17 4 mo ago also BIT-mediawiki-2021-31546 , EUVD-2021-18443
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. It incorrectly logged sensitive suppression deletions, which should not have been visible to users with access to view AbuseFilter log data.
Patch / fix
- bitnami mediawiki 1.35.3
Exploit prediction
0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mediawiki | <1.35.3 |
1.35.3 |
Classification
- Weakness
-
- CWE-532 Insertion of Sensitive Information into Log File
References
-
phabricator.wikimedia.org
/T71617
third-party-advisory, web
-
gerrit.wikimedia.org
/r/q/I38a0a24fa32ca7a052b6940864a32b3856e84553
issue-tracking, third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2021-31546
web
Sources
- CVE List CVE-2021-31546
- NVD CVE-2021-31546
- OSV BIT-mediawiki-2021-31546
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.