Fridge door not completely closed last night
Eggs are fine if left in a bowl on the counter for hours (your fridge is colder than that). Meat is often left to come to room temperature before cooking.
Milk is the most problematic, and you said yours smells fine.
I would use up the milk and white cheeses (Cottage, etc_ quickly)
Sours and cultures---sour cream, yogurt should not be affected by this ajar door overnight.
All of the above assumes your kitchen was not in th 80+ degree range overnight.
Things on the shelves of the door should be looked over - this spot is generally the warmest since it gets the most exposure each time you open it.
The main things I'd be concerned with would be raw meats, especially ground and offal.
I keep a thermometer in the fridge, it has helped me make decisions in this sort of situation several times!