'Bored' and 'boring' can be used as adjectives, but they describe things in different ways.These '-ing' adjectives describe the qualities of something, whereas the '-ed' adjectives describe a temporary state or feeling, which is caused by something.Here are two examples:
I don't like David. I think he is boring.
Oh, I'm bored. Let's go out and do something fun.
We can see this difference between a temporary feeling and a permanent quality if we look at the words you asked about – boring and bored.