CVE-2026-56702

Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload

Published Aug 25, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Vrana
Vrana adminer
Vendors & Products Vrana
Vrana adminer
Type Values Removed Values Added
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.
Title Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload
First Time appeared Adminer
Adminer adminer
Weaknesses CWE-434
CPEs cpe:2.3:a:adminer:adminer:*:*:*:*:*:*:*:*
Vendors & Products Adminer
Adminer adminer
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Aug 27, 2026, 2:36 PM
Reserved
Jun 22, 2026, 6:48 PM
Status
Deferred
Published
Aug 25, 2026, 2:16 AM
Modified
Oct 12, 2026, 3:10 PM