High 7.2Known exploited (CISA KEV)Published Feb 11, 2021

CVE-2021-21311SSRF in adminer

Updated under an hour ago (Oct 27, 2026, 9:00 AM ET)

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It affects vrana adminer and 2 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Sep 29, 2025; federal agencies had to remediate by Oct 20, 2025. Treat that date as your deadline.

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Every CVE for vrana adminer

Exploited in the last 30 days

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.

CVSS: 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-918
Known exploited: Added to CISA KEV Sep 29, 2025; federal remediation due Oct 20, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 98.46% (percentile 100)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

vrana adminer vrana:adminer (from the name)	from 4.0.0, < 4.7.9	CNA record
adminer adminer adminer:adminer	from 4.0.0 before 4.7.9	NVD
debian debian_linux debian:debian_linux	9.0	NVD

References

References

https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6	x-refsource-confirm, patch, third-party-advisory
https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf	x-refsource-misc, exploit, third-party-advisory
https://packagist.org/packages/vrana/adminer	x-refsource-misc, product, third-party-advisory
https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351	x-refsource-misc, patch
https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html	mailing-list, x-refsource-mlist, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.