It also includes a fix for a potential timing side-channel attack and prevents an attacker from locking a post from being edited.
In addition to the security fixes, WordPress 4.2.4 contains fixes for 4 bugs from 4.2.3. You can find more information at the Release Notes.
We have released Bitnami WordPress 4.2.4 (and Multisite version) installers, virtual machines and Amazon EC2, Google, VMware vCloud Air and Azure cloud images that fix these issues.
Have questions about Bitnami WordPress or the security issue? Post to our community forum, and we would be happy to help you.