Solution : https://service.sap.com/sap/support/notes/1306604 (SAP Service marketplace login required)
Key words : 
symptom authorization object c_apo_cvc, user enters pos, authorization object c_apo_cvc, prerequisites program error, c_apo_cvc reason, limit rights, cvc maintenance, create cvcs, /sapapo/mc62, variant button
Related Notes : 
       
| 1262016 | Missing authority check in APO transaction. | 
| 1235367 | Missing authority check in APO transaction. | 
| 888889 | Automatic checks for security notes using RSECNOTE |