Vulnerability details

CVE-2026-56702

vrana adminer

Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload

CVSS 4.0

7.1High

Official description

Adminer versions before 5.4.3 contain an unrestricted file upload vulnerability in the AdminerFileUpload plugin that allows authenticated users to upload PHP files by exploiting a permissive default extension allowlist. Attackers can upload PHP webshells to columns ending in _path and execute arbitrary code as the web-server user when uploadPath is web-served.

CVSS scores

Score	Version	Source	Vector
7.1High	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`
8.8High	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
vrana	adminer	v < 5.4.3	CVEProject cvelistV5 (CNA)

References and advisories

https://www.vulncheck.com/advisories/adminer-before-unrestricted-file-upload-via-adminerfileupload third-party-advisory
https://github.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5 vendor-advisory

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Details

Published: 2026-08-25
Last updated: 2026-08-27
State: Published
Assigner (CNA): VulnCheck

Exploit prediction (EPSS)

0.61%

Probability of exploitation in 30 days

49.7%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-434
Unrestricted Upload of File with Dangerous Type