The New York State and City Human Rights Laws explicitly protect interns against discrimination, including sexual harassment.
For example, the NYS Human Rights Law provides, inter alia:
It shall be an unlawful discriminatory practice for an employer to … refuse to hire or employ or to bar or to discharge from internship an intern or to discriminate against such intern in terms, conditions or privileges of employment as an intern because of the intern’s age, race, creed, color, national origin, sexual orientation, military status, sex, disability, predisposing genetic characteristics, marital status, or domestic violence victim status[.]
N.Y. Exec. Law 296-c.