Cloud service provider may decide to hold the data as a hostage if there is a dispute.
Need to ensure that its private data is stored separately from others. If another client is the victim of a hack attack, it might affect the availability or integrity of the data of other companies located in the same environment.
Data transfer across borders makes the laws to be applied even more complicated and consequently resulting in the private information to be even more vulnerable.
SQL injection attacks allow attackers to gain unauthorized access to a database.