[onion2k]

Wordpress only has one track, which is the only one that gets updates. Once a new major release is available all support for the previous release ends. If you want the most secure version you need to be on the latest (4.2.2).

[toxican]

Um, no? They do security updates for the last couple of versions of Wordpress. They even extend that to the last couple versions of their stock theme when they require an update.