OnionShare is an open source tool for securely and anonymously sharing files, hosting websites and chatting with friends using the Tor network. Used to securely and anonymously share files, host websites, and chat with friends using the Tor network, OnionShare has a security vulnerability that stems from the fact that in the affected version, chat participants can spoof their channel messages, making others believe they have left the chat room. No detailed vulnerability details are available at this time.