subject: Open Source CMS and Security [print this page] There are a number of security plug-ins are free available on net for open source CMS such as Wordpress, Magento, Joomla and flex which make these software more secure. Open source software are highly secure, that's why it is one of the main cause behind the popularity of these software. Open source Software are widely used for developing applications ranging from simple website to commercial application or e-Commerce websites.