Solution : https://service.sap.com/sap/support/notes/1290158 (SAP Service marketplace login required)
Key words : 
significantly delayed response times, attached correction instruction, terms structural authorization, ess homepage framework, complex structural authorizations, structural authorizations, response time, framework reason, symptom users, time causing
Related Notes : 
       
| 1245560 | Composite SAP Note : XSS Documentation |