Solution : https://service.sap.com/sap/support/notes/1486918 (SAP Service marketplace login required)
Key words : 
symptom crm-acp-apl, crm-acp-apl reason, apply attached correction instructions, execute arbitrary program code, full debugging rights, obtain additional information, potentially escalate privileges, executing malicious code, program code, execute code
Related Notes : 
       
| 888889 | Automatic checks for security notes using RSECNOTE |