xtreme1 <= v0.9.1 contains a Server-Side Request Forgery (SSRF) vulnerability in the /api/data/upload path. The vulnerability is triggered through the fileUrl parameter, which allows an attacker to make arbitrary requests to internal or external systems.
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.