Forum software
I gave a quick glance at the bottom and saw vBulletin Version 3! vBulletin has tons of exploits, even with the most current version 5, along with just being outdated. The main forum style does not carry over into the reply/settings page and just being clunky in the back end. What about upgrading to XenForo, or maybe Phpbb if you can't afford XenForo and having an identical theme made. XenForo does allow you to import from vBulletin and many other forum softwares. Sooner or later it will bite you in the ass that you stuck around on vBulletin v3 (trust me I've learned the hard way about technical debt).