Verizon is now pushing Moto X 2014 Security Patch Update. The Update Brings Latest Android Patches to the Moto X. There is nothing more in the update. Verizon Stated that:
The current software update gives you the most up to date Android security patch on your device.
After Updating your device you will be able to find your phone more secure. The Update Fixes the Latest Vulnerabilities found by Google.
Getting Moto X 2014 Security Patch Update
The Update Must have arrived automatically. if not check manually by going to Settings > About Phone > System Update.