XML External Entity (XXE) vulnerability in Terminalfour 8.0.0001 through 8.3.18 and XML JDBC versions up to 1.0.4 allows authenticated users to submit malicious XML via unspecified features which could lead to various actions such as accessing the underlying server, remote code execution (RCE), or performing Server-Side Request Forgery (SSRF) attacks.
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.