{"id":"CVE-2026-56702","title":"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","summary":"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 upl…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-434"],"published":"2026-08-25","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:23:49.880","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56702","references":[{"url":"https://github.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/adminer-before-unrestricted-file-upload-via-adminerfileupload","label":"disclosure@vulncheck.com"},{"url":"https://github.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00343,"epssPercentile":0.27883,"ingestedAt":"2026-09-08T21:11:12.285Z","slug":"CVE-2026-56702","body":"## Overview\n\nAdminer 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}