CVE-2021-21311SSRF in adminer
Updated under an hour ago ()
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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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Free account, 1 product
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
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
- https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6x-refsource-confirm, patch, third-party-advisory
- https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdfx-refsource-misc, exploit, third-party-advisory
- https://packagist.org/packages/vrana/adminerx-refsource-misc, product, third-party-advisory
- https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351x-refsource-misc, patch
- https://lists.debian.org/debian-lts-announce/2021/03/msg00002.htmlmailing-list, x-refsource-mlist, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311us-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.