As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LEAVING THE MIA STATION, IN THE TRANSITION BETWEEN THE CLIMB AND CRUISE PHASE, THE MESSAGE "R DOOR FWD CABIN" WAS DISPLAYED ON THE ECAM DISPLAY ACCOMPANIED BY AN INCREASE IN CABIN ALTITUDE. THE FLIGHT CREW DECIDES TO RETURN TO THE MIA STATION. THE RH FWD CABIN DOOR, THE FUSELAGE AND SENSORS WERE INSPECTED BUT NO DAMAGES WERE FOUND, THE AIRCRAFT WAS RELEASED TO SERVICE AND IT HAS PERFORMED TWO FLIGHTS AND THE FAULT HAS NOT BEEN DUPLICATED