A Content Management System (CMS) is a tool used to create, manage, and organize content on websites or web services, with WordPress being one of the most widely used examples. While different CMS platforms have varying levels of vulnerability, it is challenging to determine which is the most secure or vulnerable, as noted by expert Johan Edholm from Detectify. WordPress, due to its popularity, often reports more vulnerabilities, partly because it is scrutinized more closely and is a frequent target for cyber attacks. Edholm advises users to focus on the platform itself and to be cautious with plugins to enhance security. For those interested in more IT security insights, additional information can be found in other parts of the IT Sec FAQ series.