HTC One M8 already rooted !!!!

This method is only for the verizon variants of the HTC One M8, and witout the need of an unlocked bootloader, how cool is that.

The setup steps are incredibly simple.
  1. Download and install the app from here.
  2. Start up WeakSauce on your phone
  3. Agree to the terms and press 'root'
  4. Wait about 1 minute
  5. Install SuperSU from the Play Store
  6. That's all.