With a couple extremely time-sensitive announcements in as many weeks, I thought it would be helpful to let folks know how to get these security advisories BEFORE your website notifiies you.
Login to your drupal.org account. Then go to Profile and click on the Edit tab. A new nav bar appears, click on My Newsletters. Select "Security Announcements" and then click Save.
You can visit and bookmark this page to see the latest annoucements: Security Advisories