CVE-2026-6257

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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-04-20 20:16

Updated : 2026-06-17 11:00

NVD link : CVE-2026-6257

Mitre link : CVE-2026-6257

CVE.ORG link : CVE-2026-6257

JSON object : View

Products Affected

No product.

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

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