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Recently, the term “Metaverse” gained more interest from both industry and academia, especially after major companies announced metaverse as a novel billion-dollar industry. Metaverse is built upon various existing technologies such as virtual reality (VR), augmented reality (AR), the latest network generation (5G), blockchain, and so on. These technologies are highly developed, yet they are prone to multiple security issues. While the industry is working to develop the metaverse for average users, academia is still lacking related research, notably in the security area. However, only a few of research papers addressed the security and privacy issues related to these applications. Metaverse requires real-time and continuous data collection from users including private data such as location, identification, and biometric data. Before any further development of metaverse applications, the possible security threats must be mitigated. To this end, in this paper, we conduct a comprehensive survey on metaverse. The main contribution of this research is to give a comprehensive insight for future researchers regarding the current metaverse projects around the world and their security issues, along with some of the recent solutions and technologies used to improve metaverse quality of experience and security.