Exploit

Exploit something (disapproving) to treat a person or situation as an opportunity to gain an advantage for yourself [Oxford Learner’s Dictionaries].
To exploit someone is to use them in a way that's wrong, like an employer who pays low wages but demands long hours. An exploiter is a person who treats others this way. Someone who runs a sweatshop that makes people work all day and night in the stifling heat for a tiny paycheck is an exploiter. Some say companies that burn a lot of oil are exploiters of the Earth [Vocabulary.com].

Sources:

Exploit. Oxford Learner’s Dictionaries. Retrieved from: https://www.oxfordlearnersdictionaries.com/definition/english/exploit_1

Exploit. Vocabulary.com. Retrieved from: https://www.vocabulary.com/dictionary/exploiter