Is the sentence I want to be promoted correct how about if I will say I want to promote in a higher position correct?

The first sentence - I want to be promoted - means that 'I' wants someone to promote him . We don't know who that someone is because this is a passive sentence and in passive sentences we don't always know who does the action. This is a correct sentence.

The second sentence - I want to promote in a higher position - means that 'I' does the action of promote. But we don't know who 'I' wants to promote because there is no subject. This sentence is not correct.

I want to promote her to a higher position. - In this sentence 'I' does the action of promote and the person who is promoted is 'her'. This is a correct sentence.