My virtual server came with PHPBB pre-installed, so I set it up last year some time. Suddenly one day, I discovered it had been hacked, and “defaced.” There are several postings on the vulnerability, and naturally, plenty of fine folks and bots to trash the boards. About this time pMachine released the Forum module for Expression Engine, so, hey, why not? 
I hope my security is better here. That reminds me, I really need to back up my database ...