PT-2026-33828 · Vvveb · Vvveb Cms

Published 2026-04-20 · Updated 2026-04-20 · CVE-2026-6257

NVD

CVSS v3.1

9.1

Critical

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Vvveb CMS v1.0.8 contains a remote code execution vulnerability in its media management functionality where a missing return statement in the file rename handler allows authenticated attackers to rename files to blocked extensions .php or .htaccess. Attackers can exploit this logic flaw by first uploading a text file and renaming it to .htaccess to inject Apache directives that register PHP-executable MIME types, then uploading another file and renaming it to .php to execute arbitrary operating system commands as the www-data user.

Fix

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2026-6257

Affected Products

Vvveb Cms

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-6257 · Security Note
• https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2 · Note
• https://vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management · Note