---
id: CVE-2026-6257
title: Vvveb CMS < v1.0.8.2 Remote Code Execution via Media Management
summary: >-
  Vvveb CMS before 1.0.8.2 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
  extension…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-434
vendor: Vvveb
product: Vvveb CMS
affected:
  - cms < 1.0.8.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-04-21T18:05:35.427142Z'
published: '2026-04-20'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T21:16:17.889Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-6257'
references:
  - url: >-
      https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2
    label: Patch Commit
  - url: >-
      https://www.vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management
tags:
  - cve.org
epss: 0.00633
epssPercentile: 0.50363
ingestedAt: '2026-11-03T08:39:35.580Z'
---

## Overview

Vvveb CMS before 1.0.8.2 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.

## Affected

- `cms < 1.0.8.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.