Abstract
Web accessibility is an issue that is being spoken about more and more, yet very few Free Open Source Software (FOSS) Content Management Systems (CMS) are truly accessible. A growing number of countries are adopting legislation and regulations requiring a variety of websites to be accessible. Further, commercial interests suggest that a website that is fully accessible and usable by all visitors would increase revenues. This paper will review the basic concepts of web accessibility and discuss the challenges of implementing accessibility into existing CMS, using Mambo CMS as a case study.