A Server-Side Request Forgery (SSRF) vulnerability exists in infiniflow/ragflow version 0.12.0. The vulnerability is present in the POST /v1/llm/add_llm and POST /v1/conversation/tts endpoints. Attackers can specify an arbitrary URL as the api_base when adding an OPENAITTS model, and subsequently access the tts REST API endpoint to read contents from the specified URL. This can lead to unauthorized access to internal web resources.
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.