Summary If an attacker can successfully authenticate through SSO/Access Code, they can obtain the real backend API Key by modifying the base URL to their own attack URL on the frontend and setting up a server-side request. Details The attack process is described above. PoC Frontend: 1. Pass basic authentication (SSO/Access Code). 2. Set the Base URL to a private attack address. 3. Configure the request method to be a server-side request. 4. At the self-set attack address, retrieve the API Key information from the request headers. Backend: 1. The LobeChat version allows setting the Base URL. 2. There is no outbound traffic whitelist. Impact All community version LobeChat users using SSO/Access Code authentication, tested on version…Read More