CVE-2026-41937 givanz CVE debrief

Who should care

Users of Vvveb before version 1.0.8.3 should apply the patch to prevent exploitation of this vulnerability. The vulnerability is particularly concerning for users who have not restricted access to the plugin upload endpoint. Additionally, security teams and administrators responsible for managing and securing web applications should be aware of this vulnerability and take necessary precautions to protect their systems.

Technical summary

The vulnerability exists in the plugin upload endpoint of Vvveb before 1.0.8.3. An attacker can upload a malicious plugin ZIP file containing a plugin.php with a valid Slug header and a public/index.php file with arbitrary PHP code. When accessed via subsequent unauthenticated HTTP requests to the plugin's public path, the PHP code executes as the web server user. This could lead to complete control of the affected system. The vulnerability is caused by a lack of proper validation and sanitization of user-uploaded files.

Defensive priority

High

Recommended defensive actions

• Apply the patch to upgrade Vvveb to version 1.0.8.3 or later
• Restrict access to the plugin upload endpoint
• Monitor for suspicious plugin uploads and unauthorized access to plugin directories
• Implement additional security measures such as web application firewalls and intrusion detection systems
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-05-14T15:16:46.190Z and was last modified on 2026-07-14T21:16:52.373Z. The NVD entry is currently Deferred. The vulnerability was reported by a researcher and is being tracked by the CVE program. The affected product, Vvveb, is a web application that allows users to create and manage plugins. The vulnerability exists in the plugin upload endpoint, which allows super_admin users to upload malicious plugin ZIP files. The CVE program is working with the vendor to resolve the issue.

Official resources