Adding or Editing a BB Code 
To add a new BB code, go to Custom BB Codes > Add New BB Code. The form will look similar to this:

Brad 20th Apr 2005, 11:03am
I see alot of boards that allow their members to post flash via added bbcodes. This is a big security risk, members can grab cookies and other sensitive data via .swf files.

Remember BBcode is here to make sure submitted data will be safe, but custom codes are only as safe as you make them.
JT 20th Apr 2005, 11:03am
I do believe the new flash is sandboxed and will prompt the user before any transfer of info out of the swf hosted domain can take place.