Defense Acquisition Research Journal (ARJ) - is a scholarly peer-reviewed journal published by the Defense Acquisition University (DAU). All submissions receive a blind review to ensure impartial evaluation.
Cream cheese should be unrefrigerated for no more than 2 hours.
I think you're safe. Cheesecake is better at room temperature but best stored cold. Figure it didn't cool completely until about 12 am. At that point it sat for about 6 hours. You can leave cream cheese out for about 6 hours but not much more than that.