CVE-2021-41799
HIGHCVSS 7.5/10EPSS 1.65%
Last modified
CVE-2021-41799 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.65% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | < 1.36.2 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
| Fedoraproject | Fedora | 35 |
References
- https://phabricator.wikimedia.org/T290394Permissions Required
- https://phabricator.wikimedia.org/T290394Permissions Required
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-41799?
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 severe is CVE-2021-41799?
CVE-2021-41799 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.65% probability of exploitation in the next 30 days.
How do I fix CVE-2021-41799?
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.
Are you affected by CVE-2021-41799?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST