PT-2026-33828 · Vvveb Cms · Vvveb Cms

Published 2026-04-20 · Updated 2026-04-21 · CVE-2026-6257

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Vvveb CMS version 1.0.8

Description A remote code execution flaw exists in the media management functionality. A missing return statement in the file rename handler allows authenticated attackers to rename files to blocked extensions such as '.php' or '.htaccess'. This logic flaw can be exploited by uploading a text file and renaming it to '.htaccess' to inject Apache directives that register PHP-executable MIME types, followed by uploading another file and renaming it to '.php' to execute arbitrary operating system commands as the www-data user.

Recommendations Update Vvveb CMS version 1.0.8 to a newer version that contains a fix for this issue.

Fix

RCE

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2026-6257

Affected Products

Vvveb Cms

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-6257 · Security Note
• https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2 · Note
• https://twitter.com/0dayPublishing/status/2046312909391712475 · Twitter Post
• https://twitter.com/CVEnew/status/2046571909417185646 · Twitter Post
• https://twitter.com/OrizonCyber/status/2046325570938556560 · Twitter Post
• https://vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management · Note