It would be important to observe that person and see how they relate to others. I have met many people who have survived sexual abuse; some are promiscuous and out of control and others are in control more than most people.
It would be important that they got help or were presently getting help from a therapist. And it would be important not to rush a marriage. Some therapy can stir up a lot of things and a person may not be in the best emotional state to be a supportive spouse at that time.
There are grounds for annulment that relate to entering into marriage without fully being aware of the effects of child abuse on one or both of the parties. It is a terrible thing to live with, I have been told, and it can be like a wall to block emotional connection. Getting professional help can help break down that wall.
I would not discriminate, though. If someone had experienced abuse and was eager to gain progress in healing and recovery, they might be better candidates for marriage than someone else who is clueless to any effects of abuse. It certainly would depend upon the person, their behavior, character, and trustworthiness. And it would depend upon the other person understanding the weight of the problem.
True love conquers all, but be wise and careful.