CVE-2021-41799
7.5
HIGH
CVSS 3.1
EPSS 1.2%
Description
MediaWiki before 1.36.2 allows a denial of service (resource consumption because of lengthy query processing time). ApiQueryBacklinks (action=query&list=backlinks) can cause a full table scan.
How to fix CVE-2021-41799
To remediate CVE-2021-41799, upgrade the affected package to a fixed version below.
- Bitnami/mediawiki—upgrade to 1.36.2 or later
- Debian/mediawiki—upgrade to 1:1.35.4-1~deb11u1 or later
Is CVE-2021-41799 being exploited?
Low — EPSS is 1.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.36.2
- from 0, < 1:1.35.4-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (8)
- ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-41799
- WEBlists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN/
- WEBlists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA/