SAP have now issued a KB
SAP note 1968652 - "SecurityException: Missing required Permissions manifest attribute in main.jar" error occurs after installed Java 7 Update 51
http://service.sap.com/sap/support/notes/1968652
The official ORACLE FAQ is
http://java.com/en/download/faq/exception_sitelist.xml
ORACLE developers blog
https://blogs.oracle.com/java-platform-group/entry/upcoming_exception_site_list_in
these two official sites say don't use * but DO use a final /
Michael
I note that you have set your Security Level to medium which will reduce security but may have been the reason yours now works