A secure BBS... ha ha ha
Any BBS will have holes and back doors man. Check it out. http://www.undergroundnews.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=1;t=000265
this is the URL for this topic.
you have the normal URL http://www.undergroundnews.com/cgi-bin/ubbcgi/ultimatebb.cgi
then the command stuff
This command say get topic, as opposed to post or delete or whatever other commands there are
This say forum 1. I imagine the forum below this is forum 2
Topic number 265
Now if someone was to play with your URL long enough I am sure they could get somewhere they aren't supposed to be. Well with some skill.
Just make sure Passwords are encrypted and you exersise all security options you can. Also visit their site often and look for security updates.