DNN affected by Stored Cross-Site Scripting (XSS) in Profile Biography field

Summary

Users can use special syntax to inject javascript code in their profile biography field. Although there was sanitization in place, it did not cover all possible scenarios

Description

When embedding information in the Biography field, even if that field is not rich-text, users could inject javascript code that would run in the context of the website and to any other user that can view the profile including administrators and/or superusers.