Greetings!
I'm a member on web fora that use similar software, and one of them recently reported needing to upgrade their software because of a recently discovered security hole. It's a plausible threat because a different forum I was on, that uses the same software, was hacked and had to be shut down (I'm not sure if that was directly due to the software though). I don't have any more useful information, other than "please make sure you have the latest security upgrades"...