CVE-2026-6257: Vvveb CMS < v1.0.8.2 Remote Code Execution via Media Management
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-6257?
CVE-2026-6257 is classified as a critical severity vulnerability due to its potential for remote code execution.
How does CVE-2026-6257 allow remote code execution?
CVE-2026-6257 allows remote code execution by enabling authenticated attackers to rename files with blocked extensions like .php in the media management functionality.
Who is affected by CVE-2026-6257?
CVE-2026-6257 affects users of Vvveb CMS version 1.0.8.
What steps should be taken to remediate CVE-2026-6257?
To remediate CVE-2026-6257, it is recommended to upgrade to a patched version of Vvveb CMS that addresses this vulnerability.
Are there any known exploits for CVE-2026-6257?
There are currently no publicly disclosed exploits specifically targeting CVE-2026-6257, but the vulnerability poses significant risk if left unaddressed.