CVE-2026-56702
Published:August 25, 2026
Updated:September 24, 2026
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.
Affected Packages
https://github.com/vrana/adminer.git (GITHUB):
Affected version(s) >=v4.2.0 <v5.4.3Fix Suggestion:
Update to version v5.4.3vrana/adminer (PHP):
Affected version(s) >=v4.2.0 <v5.4.3Fix Suggestion:
Update to version v5.4.3Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Unrestricted Upload of File with Dangerous Type
EPSS
Base Score:
0.34