eventrakete.de XSS vulnerability

Vulnerable URL: https://www.eventrakete.de/?s=aa%27aa%22onfocus%3Dprompt%28%2FOPENBUGBOUNTY%2F%29+autofocus%3Dx+bad%3D--%3E%3C%2Ftitle%3E%3C%2Fscript%3E%3Cimg+src%3Dx+onerror%3Dprompt%28%2FOPENBUGBOUNTY%2F%29%3E Details: Description| Value ---|--- Patched:| Yes, at 27.08.2017 Latest check for...