Morning, if you import a contact from within a csv file like this:
"/><script>alert(document.cookie);</script>";123123123;12313
FATAL ERROR
then reload ... you will see your cookie!
I don't know how serious this actually is and I couldn't find a contact email ... So I left this here ...
I tested this against the asterisk phonebook found in trixbox ce (the latest stable release). I haven't had a chance to test this against the stable version of freepbx.