Moral hazard vs hidden information. What is the difference between hidden information and moral hazard?

I cannot understand these two terms mainly. Please explain. Thank you.
Hidden information concerns characteristics that are unobservable by one side of the market. For example, a consumer's willingness to pay, a worker's productivity, the quality of a used car all fall under this category. The characteristics in question are typically assumed to be fixed or very costly to modify. 

Moral hazard concerns actions that are unobservable by one side of the market. For example, the effort that a CEO puts into managing a company and the care that an insured driver takes to maintain the condition of his car both fall under this category. By their very nature, the (unobservable) actions can be easily changed to suit the incentive structure of the problem.