CVE-2021-31547 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-2021-31547 , EUVD-2021-18444
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. Its AbuseFilterCheckMatch API reveals suppressed edits and usernames to unprivileged users through the iteration of crafted AbuseFilter rules.
Patch / fix
- bitnami mediawiki 1.35.3
Exploit prediction
0.87% chance of exploitation in the next 30 days, higher than 59% 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-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
phabricator.wikimedia.org
/T223654
third-party-advisory, web
-
gerrit.wikimedia.org
/r/q/I3f7dbd8b873d411e37c8c3aac2339bf5ec36907d
issue-tracking, third-party-advisory, web
-
gerrit.wikimedia.org
/r/q/I4900b1be73323599d74e3164447f81eded094d75
issue-tracking, third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2021-31547
web
Sources
- CVE List CVE-2021-31547
- NVD CVE-2021-31547
- OSV BIT-mediawiki-2021-31547
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