Joomla is the most preferred content management system (CMS), which allows you to build powerful websites and online applications.
Joomla is a free and open source content management system (CMS) for publishing web content. Over the years, Joomla! won several awards. It is based on a modeled - view - controller web application infrastructure that can be used independently of the CMS, allowing you to build powerful online applications.
Even though Joomla is a fairly secure CMS, the best thing you can do is implement security best practices to protect yourself.