Unfortunately, cross-site request forgery attacks are not limited to the HTTP protocol. WebSocket hijacking (sometimes known as CSWSH) is a commonly overlooked vulnerability in most realtime applications. Fortunately, since Sails treats both HTTP and WebSocket requests as first-class citizens, its built-in CSRF protection and configurable CORS rulesets apply to both protocols.
You can prepare your Sails app against CSWSH attacks by enabling the built-in protection in
config/security.js and ensuring that a
_csrf token is sent with all relevant incoming socket requests. Additionally, if you're planning on allowing sockets to connect to your Sails app cross-origin (i.e. from a different domain, subdomain, or port) you'll want to configure your CORS settings accordingly. You can also define the
authorization setting in
config/sockets.js as a custom function which allows or denies the initial socket connection based on your needs.