givanz Vvveb 1.0.8 unrestricted upload

Summaryinfo

A vulnerability categorized as critical has been discovered in givanz Vvveb 1.0.8. Impacted is an unknown function. Such manipulation leads to unrestricted upload. This vulnerability is uniquely identified as CVE-2026-6257. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in givanz Vvveb 1.0.8. It has been rated as critical. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed by Mohammed El Ouardani as 6fb8eaa998265e33e8802cbc220d8859dbc144f2. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-6257 since 04/13/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/20/2026). The MITRE ATT&CK project declares the attack technique as T1608.002.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-23942). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• givanz

Name

• Vvveb

Version

• 1.0.8

Website

• Product: https://github.com/givanz/Vvveb/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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