Language: JavaScript
Label: safe
CWE: CWE-352 \u2014 Cross-Site Request Forgery (CSRF)
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

Code:
    send: function(msg, toUserId) {

        wss.send(JSON.stringify({
            "type"   : "message",
            "toUser" : toUserId,
            "msg"    : msg
        }));

    }