CVE-2026-56702Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-vcvj-rwwm-x6g5) vendor-advisory
• VulnCheck Advisory: Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload third-party-advisory