CVE-2026-6257CWE-434

Vvveb CMS < v1.0.8.2 Remote Code Execution via Media Management

Critical · published April 20, 2026

CVSS v4.0
9.2
EPSS
1%
Percentile
59.6
In the wild
Unconfirmed
What it is

Vvveb CMS v1.0.8.2 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.

The record
Technical detail
CVSS v4.0
9.2 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:H/SA:N
EPSS
0.00910 · 59.6th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-04-20T19:09Z
EPSS history
Timeline
  • 20 APR 19:09Z
    Vvveb CMS < v1.0.8.2 Remote Code Execution via Media Management
    cvelistv5