CVE-2021-21311 KEV
7.2
HIGH · CVSS 3.1 · EPSS 98.5% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2025-10-20.
Description
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.
Scoring
| CVSS | 7.2 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| EPSS | 98.46% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-918 |
| On CISA KEV | yes — remediate by 2025-10-20 |
| Public exploit | none known |
| Published | 2021-02-11 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Adminer Server-Side Request Forgery Vulnerability |
|---|---|
| Added | 2025-09-29 |
| Due | 2025-10-20 |
| Vendor / product | Adminer / Adminer |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| adminer | adminer |
| debian | debian linux |
References
- https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351
- https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf
- https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6
- https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html
- https://packagist.org/packages/vrana/adminer
- https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351
- https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf
- https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6
- https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html
- https://packagist.org/packages/vrana/adminer
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311
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