Latterly, one of my clients that use an open-source content management system was hacked numerous times. I have discussed CMS's during the past. But I have not especially discussed the incontrovertible fact that open source CMS's are susceptible to hacking by hackers. Well, they are. That is the repugnant truth. Even with a heavily customised open source CMS (like the one my formerly discussed customer is using), the sites are terribly prone to hacking. Usually because any person can view the code and search for weakness in it.