Collaborative Mixed Reality is the combination of Virtual Reality (VR) and Augmented Reality (AR), with the primary application of allowing users to interact with digital objects in its real environment. Like its name suggests, Collaborative Mixed Reality Environment is about enabling more than one user to have an interaction with digital objects that are shared in real time. This paper is an investigation on Cybersecurity Vulnerabilities in a Collaborative Mixed Reality Environment on game payment system using real-time experiment, and research on improving security systems protocols.