CVE-2021-21311 kev in the critical feed json
SSRF in adminer
published 2021-02-11 5 y ago modified 2026-09-10 1 mo ago also GHSA-x5r2-hj5c-8jx6 , EUVD-2021-0576
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Exploited
- added 2025-09-29
- epss
- 98.5%
- EPSS 98.5% chance of exploitation in 30 days, percentile 99.9%
- public exploits
- 0
- none known, plus a Nuclei check
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.
Patch / fix
cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- packagist vrana/adminer 4.7.9
- adminer adminer 4.7.9
- adminer Debian 14, Debian 13, Debian 12 4.7.9-1
debian advisories DEBIAN-CVE-2021-21311
- adminer Ubuntu Pro 16.04 LTS 4.2.1-1ubuntu1+esm1
- adminer Ubuntu Pro 18.04 LTS 4.6.2-1ubuntu0.1~esm1
- adminer Ubuntu Pro 20.04 LTS 4.7.6-1ubuntu0.1~esm1
ubuntu advisories UBUNTU-CVE-2021-21311
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Timeline
- Published
- CISA SSVC: exploitation active
- Added to CISA KEV
- CISA patch deadline
Known exploited
- Added
- 13 mo ago
- Patch by
- 2025-10-20 (12 mo ago)
- Ransomware
- Not known
- Required action
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Vendor, product
- Adminer, Adminer
- CISA name
- Adminer Server-Side Request Forgery Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 13 mo ago
Exploit prediction
98.46% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Adminer <4.7.9 - Server-Side Request Forgery nuclei detection template
- github.com https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |
| GitHub | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | vrana/adminer | <4.7.9 |
4.7.9 |
Affected products
- vrana adminer
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351
web, patch
-
github.com
/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6
web, patch, third-party-advisory
-
github.com
/vrana/adminer/files/5957311/Adminer.SSRF.pdf
web, exploit, third-party-advisory
-
packagist.org
/packages/vrana/adminer
web, product, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2021/03/msg00002.html
mailing-list, web, third-party-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311
government-resource, web, us-government-resource
-
nvd.nist.gov
/vuln/detail/CVE-2021-21311
advisory
-
github.com
/vrana/adminer
package
-
sourceforge.net
/p/adminer/news/2021/02/adminer-479-released
web
Sources
- CVE List CVE-2021-21311
- GitHub Advisory GHSA-x5r2-hj5c-8jx6
- NVD CVE-2021-21311
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