Web hosts recently discovered a vulnerability that requires critical maintenance. Servers may be down for a few moments this week but they will return to operation shortly. For more information, see XSS Vulnerability Affects More Than a Dozen Popular WordPress Plugins at WP Tavern.
The way this release was coordinated makes us proud to be a member of the WordPress community. Learn more at Security updates for our GA and SEO plugins & many others at Yoast.com.