CVE-2021-21311
SSRF in adminer
- Published
- Feb 11, 2021
- Updated
- Oct 21, 2025
- Assigning CNA
- GitHub_M
- Evidence observed
- Sep 29, 2025
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:NHigh · next 30 days
- Percentile
- 99.9%
- Model date
- Oct 19, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9.
Sources
adminer/CVE-2021-21311
Adminer Server-side Request Forgery on Error Page of Elasticsearch and ClickHouse (CVE-2021-21311)
Vulhub vulnerability labsDeclared conditions
- lab image version: vulhub/adminer:4.7.8(adminer/CVE-2021-21311/docker-compose.yml:services.web.image)
http/cves/2021/CVE-2021-21311.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: status,word($.matchers[*].type)
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