MediaWiki before 1.36.2 allows a denial of service (resource consumption because of…
Priority LOW 28CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.
Summary
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.
Why it matters now
EPSS 0.01857 79th percentileScored 2026-11-07
Fix Partial mediawiki/core (Packagist): 1.36.2Red Hat: 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | mediawiki/core (Packagist) | before 1.36.2 | 1.36.2 | Patch available | GHSA-c8wv-qwwc-6j73 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- mediawiki/core (Packagist) Vendor— Affected before 1.36.2 Fixed in 1.36.2 Patch available GHSA-c8wv-qwwc-6j73
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* | before 1.36.2 | Vulnerable | mediawiki |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* Versions before 1.36.2 Vulnerable ·mediawiki
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
Remediation
- Fix · GHSA-c8wv-qwwc-6j73 mediawiki/core (Packagist) Fixed in 1.36.2 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 3.11 | Affected | No fix planned: Out of support scope |
Timeline
- 2026-10-02 Threatist record created from CVE-2021-41800
- 2026-10-03 Alias added: GHSA-c8wv-qwwc-6j73
References
Advisory 5
Other 6
- https://phabricator.wikimedia.org/T284419
- https://lists.wikimedia.org/hyperkitty/list/wikitech-l%40lists.wikimedia.org/thread/2IFS5CM2YV4VMSODPX3J2LFHKSEWVFV5/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN
- https://lists.fedoraproject.org/archives/list/[email protected]/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA
- https://lists.fedoraproject.org/archives/list/[email protected]/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX
- https://lists.wikimedia.org/hyperkitty/list/[email protected]/thread/2IFS5CM2YV4VMSODPX3J2LFHKSEWVFV5
Sources
- CVE-2021-41800 · CVE Program
- CVE-2021-41800 · NVD
- FIRST EPSS
- GHSA-c8wv-qwwc-6j73 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-41800 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences