High severity · published Feb 11, 2021
CVE-2021-21311
SSRF in adminer
In wildKEV
7.2
CVSS
98.5%
EPSS
Yes
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)98.5% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Sep 29, 2025
Federal remediation dueOct 20, 2025
Ransomware campaign useNot known
Affected products
Which versions
AD
adminer · vrana
>= 4.0.0, < 4.7.9 · source: vendor, NVD, KEV
DL
Debian Linux · Debian
9.0 · source: NVD
In the news
VulnerabilityHigh
[CISA KEV] CVE-2021-21311: Adminer Adminer - Adminer Server-Side Request Forgery Vulnerability
Adminer contains a server-side request forgery vulnerability that, when exploited, allows a remote attacker to obtain potentially sensitive information.
ADAdminerCVE-2021-21311
Sep 29, 2025·CISA KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21311
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21311
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_CONFIRM
https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6
x_refsource_MISC
https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf
x_refsource_MISC
https://packagist.org/packages/vrana/adminer
x_refsource_MISC
https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351
mailing-list
https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html
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