No. As far as I’m concerned, nothing can be morally wrong if it doesn’t hurt anyone or affect anyone in a negative way, and that includes adults being sexually attracted to kids. In fact, the only important difference between an adult being sexually attracted to a kid and an adult being sexually attracted to an adult is the fact that one is forbidden by most of society or most societies.

Other than that, it’s no different than any other sexual attraction. Some people like male people, some people like female people, some people like tall people, some people like short people, some people like old people, some people like young people. And even if people had control over who they’re attracted to, a person’s attraction affects no one. So it can’t be wrong.