Earlier today, we released a new version of Jetpack, 12.1.1. This release contains a critical security update. While we have no evidence that this vulnerability has been exploited yet, please update your version of Jetpack as soon as possible to ensure the security of your site.
To help you in this process, we have worked closely with the WordPress.org Security Team to release patched versions of every version of Jetpack since 2.0. Most websites have been or will soon be automatically updated to a secured version.
Continue reading → Jetpack 12.1.1: Critical Security Update