Checkmarx detecting Vulnerability in Model class

Question

I have recently received a vulnerability report for my project, build using tool "CheckMarx". I'm ok with many of the results but it is even pointing some simple C# Model classes as vulnerable.

for example:-

    public class abc
    {
         public string UserId{get;set;}
         public string ClientId{get;set;}
         public string UserName{get;set;}
         public string EToken{get;set;}
    }

I don't understand what exactly causing vulnerable behaviour.