CVE-2026-6257

CRITICAL 9.1

Vvveb CMS v1.0.8 Remote Code Execution via Media Management

CVSS Score

9.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-434
Vendor	vvveb
Product	vvveb cms
Published	Apr 20, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Vvveb / Vvveb CMS

1.0.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2 vulncheck.com: https://www.vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management

Credits

Mohammed EL OUARDANI