myheritage.com XSS vulnerability

Vulnerable URL: https://www.myheritage.com/FP/genealogy-search-ppc.php?firstName=oleo=mfmf%22%27%20Style=position:fixed;top:0;left:0;font-size:999px;%20OnMouseEnter=confirm/openbugbounty/%20//=1=summary Details: Description| Value ---|--- Patched:| Yes, at 03.09.2017 Latest check for patch:|...