A Cross-Site Request Forgery (CSRF) vulnerability exists in the product image upload function of VirtueMart that bypasses the CSRF protection token. An attacker is able to craft a special CSRF request which will allow unrestricted file upload into the VirtueMart media manager.
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.