From NRA-ILA:

Possibly even more concerning with DOJ’s online registration system were the reports of the system’s improper disclosure of personal information to other users. There have been confirmed reports of individuals attempting to register their firearms who were improperly given access to the account information associated with another individual, due to a complete breakdown of CA DOJ’s registration application system. In some cases, the system allowed users to see all the personal information (including home address, telephone number, email, and Driver’s License number) for another user and all the information that user had submitted for registering their firearms as “assault weapons”—including the firearms make/model/serial number and all of the photos and attachments to the user’s registration application.