For security related discussions, please do not open a bug report nor publish your findings but contact Oracle first. Please continue to read here.
Security related discussions are related to reports about (potential) bugs in VirtualBox allowing a guest to penetrate or crash the host, allowing one guest to communicate with another guest using hidden channels and things like that. For normal questions (e.g. How can I permit users to start a VM? or something like that), please ask your question in our Community forum!