Security releases for web applications
How can I be aware of any vulnerabilities of the CMS that I used to build my site?

To learn about all the new security releases in the application you used to build your website, you can follow the appropriate link for the app you are interested, from below:

Joomla
WordPress
Drupal
PrestaShop
OpenCart
phpBB
Moodle
ModX

Following the links above will take you to the respective website that tracks all of the latest security releases and new features about the most popular Content Management Systems (CMS).