There are a lot of security issues, most of them related to
the wonderfully powerful features of Breeze. In a meeting, you can
share any file from your hard drive. Breeze does not screen the
files for viruses. YOu can share your desktop, so you could reveal
something on your computer that you shouldn't. You can take control
of another user's machine and you could see something you
shouldn't.
Also on the server side, Breeze communication server only
supports SMTP for sending email notifications. This is an old
standard which does not support validation, so if your email server
allows your Breeze server to send messages, you could be vunerable
to spoofing and then spam getting sent from your email
server.