I wanted a convenient place to reference the latest WordPress and Drupal Security Advisories, so I added the WP RSS Aggregator and then added both the WordPress Security Advisories and Drupal Security Advisories RSS feeds.

WordPress Security Advisories

Drupal Security Advisories

Microsoft Security Advisories

Other Links:

Cold Fusion Security Advisories

Java Security Advisories

PHP Security Advisories

MySQL Security Advisories

Amazon AWS Security Advisories

Mozilla Security Advisories

VMWare Security Advisories