Versions of terriajs-serverprior to 2.7.4 are vulnerable to Server-Side Request Forgery (SSRF). If an attacker has access to a server whitelisted by the terriajs-server proxy or if the attacker is able to modify the DNS records of a domain whitelisted by the terriajs-server proxy, the attacker can use the terriajs-server proxy to access any HTTP-accessible resources that are accessible to the server, including private resources in the hosting environment.