Joomla! is a free and open-source content management system written in PHP. It uses object oriented programming techniques and is built on a model-view-controller web application framework. It includes features such as page caching, RSS feeds, printable versions of pages, news flashes, blogs, polls, search, and support for language internationalization.
Joomla! contains the following vulnerabilities:
CVE-2016-8869:  – Core – Elevated Privileges – Incorrect use of unfiltered data allows for users to register on a site with elevated privileges.
CVE-2016-8870:  – Core – Account Creation – Inadequate checks allows for users to register on a site when registration has been disabled.
Joomla! 3.4.4 through 3.6.3
Successful exploitation allows attackers to execute arbitrary code with elevated privileges, or create accounts even when registration is disabled.