Resource exhaustion in MediaWiki
CVE-2021-41800
MediaWiki before 1.36.2 allows a denial of service (resource consumption because of lengthy query processing time). Visiting Special:Contributions can sometimes result in a long running SQL query because PoolCounter protection is mishandled.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.018 (77.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- MediaWiki
- Fedoraproject Fedora — versions 33, 34, 35
Weakness classification (CWE)
References
- phabricator.wikimedia.org/T284419 (Permissions Required)
- lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/2IFS5…
- github.com/wikimedia/mediawiki/commit/781caf83dba90c18349f930bbaaa0e89f003f874 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202305-24 (vendor-advisory)
Frequently asked questions
- What is CVE-2021-41800?
- CVE-2021-41800 is a medium-severity vulnerability in MediaWiki, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2021-10-11.
- How severe is CVE-2021-41800?
- Medium severity. CVSS v3 base score is 5.3 out of 10.