CVE-2026-56702

HIGH 8.8

Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-434
Vendor	vrana
Product	adminer
Published	Aug 25, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

vrana / adminer

0 < 5.4.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 riodrwn