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CVE-2021-21311

HIGHCISA KEV

7.2

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.

CVE Details

CVSS v3.1 Score7.2

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/11/2021

Last Modified10/24/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorAdminer

ProductAdminer

Vulnerability NameAdminer Server-Side Request Forgery Vulnerability

KEV Date Added2025-09-29

Remediation Due Date2025-10-20

Ransomware UseUnknown

Affected Products

adminer:adminerdebian:debian_linux

Weaknesses (CWE)

CWE-918

References

https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351(security-advisories@github.com)

https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf(security-advisories@github.com)

https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6(security-advisories@github.com)

https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html(security-advisories@github.com)

https://packagist.org/packages/vrana/adminer(security-advisories@github.com)

https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html(af854a3a-2127-422b-91ae-364da2661108)

https://packagist.org/packages/vrana/adminer(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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