Vulnerability in MediaWiki
CVE-2021-36126
An issue was discovered in the AbuseFilter extension in MediaWiki through 1.36. If the MediaWiki:Abusefilter-blocker message is invalid within the content language, the filter user falls back to the English version, but that English version could also be invalid on a wiki. This would result in a fatal error, and potentially fail to block or restrict a potentially nefarious user.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (67.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
References
- phabricator.wikimedia.org/T284364 (Exploit, Patch, Issue Tracking, Vendor Advisory)
- gerrit.wikimedia.org/r/q/I9e9f44b7663e810de70fb9ac7f6760f83dd4895b (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-36126?
- CVE-2021-36126 is a critical-severity vulnerability in MediaWiki. CVSS score: 9.8/10. Published 2021-07-02.
- How severe is CVE-2021-36126?
- Critical severity. CVSS v3 base score is 9.8 out of 10.