givanz Vvveb up to 1.0.8.0 Installation Endpoint env.php subdir code injection

Summaryinfo

A vulnerability identified as critical has been detected in givanz Vvveb up to 1.0.8.0. This affects an unknown function of the file env.php of the component Installation Endpoint. Performing a manipulation of the argument subdir results in code injection. This vulnerability is identified as CVE-2026-39918. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in givanz Vvveb up to 1.0.8.0. This affects some unknown functionality of the file env.php of the component Installation Endpoint. The manipulation of the argument subdir with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Vvveb prior to 1.0.8.1 contains a code injection vulnerability in the installation endpoint where the subdir POST parameter is written unsanitized into the env.php configuration file without escaping or validation. Attackers can inject arbitrary PHP code by breaking out of the string context in the define statement to achieve unauthenticated remote code execution as the web server user.

The weakness was released by Mohammed El Ouardani. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-39918 since 04/07/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

By approaching the search of inurl:env.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.0.8.1 eliminates this vulnerability. Applying the patch 5162c1639130bd080ab63c7d856788cd59d6b3b7 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• givanz

Name

• Vvveb

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8.0

Website

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

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