Vulnerability · Published Oct 11, 2021 · Assigned by mitre
CVE-2021-41800
Medium 5.3
In plain English
A medium-severity security flaw in the mediawiki package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.9% (higher than 79% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.3Medium
Exploit odds (30 days)1.9%top 20.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mediawiki | 1:1.35.4-1 | DEBIAN-CVE-2021-41800 |
| Debian:13 | mediawiki | 1:1.35.4-1 | DEBIAN-CVE-2021-41800 |
| Debian:14 | mediawiki | 1:1.35.4-1 | DEBIAN-CVE-2021-41800 |
| Packagist | mediawiki/core | 1.36.2 | GHSA-c8wv-qwwc-6j73 |
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2021-41800 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2021-41800 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2021-41800 |
Affected products (as reported)
References
- https://phabricator.wikimedia.org/T284419
- https://lists.wikimedia.org/hyperkitty/list/wikitech-l%40lists.wikimedia.org/thread/2IFS5CM2YV4VMSODPX3J2LFHKSEWVFV5/
- https://github.com/wikimedia/mediawiki/commit/781caf83dba90c18349f930bbaaa0e89f003f874
- FEDORA-2021-eee8b7514f vendor-advisory
- FEDORA-2021-56d8173b5e vendor-advisory
- FEDORA-2021-3dd1b66cbf vendor-advisory
- GLSA-202305-24 vendor-advisory