[+] ExploiT [1] : If you are allowed to leave a comment:
Persistent XSS Vulnerability: You can inject Javascript Code in your
comment.
The Code will be displayed below the event.
[+] ExploiT [2] : If you are allowed to book an event:
Persistent XSS Vulnerability: You can inject Javascript Code in [Name] ,
[Email] , [Phonenumber] , [Comment]
The Code will be displayed in the Wordpress Backend ->
http://www.site.com/wp-admin/admin.php?page=events-manager-people