Small CMS

I need a small CMS to be built into my website. I already have a PHP dynamic backend so it needs to be compatible with it (I developed the preexisting backend). I need this compatible with what I have and the framework that is already in place so please, you must be an expert (and no SCRIPTS please, original work only!). The CMS MUST BE SECURE AGAINST INJECTIONS, XSS, ETC. I will test your program for vulnerabilities. There must be an wysiwyg html editor when posting content. There will not be a feature to add new sections, instead, the admin of the site will be able to add permissions, etc for users. What I already have done: Secure login A little bit of an administrative panel (I need this completed) Advanced IP ban script (this is built into the admin panel) Backend framework Please post questions/comments. If you complete this project with high quality and quickly, I will choose you for more projects. I have a lot coming up!