CVE-2021-21311
SSRF in adminer
- High 7.2
- Exploited: added to CISA KEV 29 Sep 2025
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.
Key facts
- Published
- 11 Feb 2021
- Last changed
- 21 Oct 2025
- Assigned by
- GitHub_M
- KEV added
- 29 Sep 2025
- KEV fix due
- 20 Oct 2025
- EPSS
- 98.464% likely to be exploited in the next 30 days, higher than 99.92% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: partial
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.2CVSS 3.1, Highfrom the CNA (GitHub_M)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| vrana | adminer |
|
Timeline
- 11 Feb 2021 Published
- 29 Sep 2025 CVE-2021-21311 added to CISA KEV
- 29 Sep 2025 Added to the CISA KEV catalogue