Hey Guys,
If you are using Forum 0.2 or Forum 0.2.1 you are strongly recommended to update to the latest release - 0.2.3. We recently patched a security hole in the release and therefore your older forum code could be comprised.
You can download it at http://silverstripe.org/assets/modules/stable/forum-v0.2.3.tar.gz
Thanks to all in the community who pointed this issue out, and if you find any security holes in any of our modules / core software please email the module maintainer or security [at] silverstripe [dot] com.
Cheers,