CVE-2021-31545
MEDIUMCVSS 5.3/10EPSS 0.82%
Last modified
CVE-2021-31545 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted.. EPSS estimates a 0.82% chance of exploitation in the next 30 days.
Description
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | <= 1.35.2 |
References
- https://gerrit.wikimedia.org/r/q/I8d5ed9ca84282ee50832035af86123633fc88293Issue Tracking, Vendor Advisory
- https://phabricator.wikimedia.org/T71367Third Party Advisory
- https://gerrit.wikimedia.org/r/q/I8d5ed9ca84282ee50832035af86123633fc88293Issue Tracking, Vendor Advisory
- https://phabricator.wikimedia.org/T71367Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-31545?
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted.
How severe is CVE-2021-31545?
CVE-2021-31545 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31545?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-31537SIS SIS-REWE Go before 7.7 SP17 allows XSS: rewe/prod/web/in…6.1
- CVE-2021-31538LANCOM R&S Unified Firewall (UF) devices running LCOS FX 10.…7.5
- CVE-2021-31539Wowza Streaming Engine before 4.8.8.01 (in a default install…5.5
- CVE-2021-3154An issue was discovered in SolarWinds Serv-U before 15.2.2. …7.5
- CVE-2021-31540Wowza Streaming Engine through 4.8.5 (in a default installat…7.1
- CVE-2021-31542In Django 2.2 before 2.2.21, 3.1 before 3.1.9, and 3.2 befor…7.5
- CVE-2021-31546An issue was discovered in the AbuseFilter extension for Med…4.3
- CVE-2021-31547An issue was discovered in the AbuseFilter extension for Med…4.3
- CVE-2021-31548An issue was discovered in the AbuseFilter extension for Med…6.5
- CVE-2021-31549An issue was discovered in the AbuseFilter extension for Med…4.3
- CVE-2021-3155snapd 2.54.2 and earlier created ~/snap directories in user …5.5
- CVE-2021-31550An issue was discovered in the CommentBox extension for Medi…5.4
Are you affected by CVE-2021-31545?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST