CVE-2026-56702

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Vrana Adminer

PublishedAug 25, 2026

First seenAug 25, 2026

Weakness typeCWE-434Unrestricted upload of dangerous file type

How to fix

Update

vrana adminer5.4.3 or later

Vendor advisories

github.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5

Affected products

Product	Affected versions	Fixed in
vrana adminer	v < 5.4.3	5.4.3

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.