Ars Technica reports Clubhouse carried a vulnerability that allowed anonymous individuals to enter random chats without detection. Security researcher Katie Moussouris discovered the issue, which would allow these "ghosts" to not only lurk in chats, but also let them interrupt conversations out of a moderator's control. Moussouris found the hack could be accessed in various ways but most easily with two iPhones using the social media application. Clubhouse has patched the issue following Moussouris' discovery.