CVE-2026-56702CWE-434unrestricted-file-upload

CVE-2026-56702

High · published August 25, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
48.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
7.1 · 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
EPSS
0.00616 · 48.9th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-08-25T06:16Z
References (3)
https://github.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5 · [email protected]https://www.vulncheck.com/advisories/adminer-before-unrestricted-file-upload-via-adminerfileupload · [email protected]https://github.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 26 AUG 08:15Z
    EPSS moved — → 0%
    epss
  • 25 AUG 01:30Z
    Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload
    cvelistv5