Set Ignore Movement Input (Authoritative?) HALP!

I want to insure that when the server disables the movement input for a character. I intend to achieve this with the “Set Ignore Movement Input” targeting a player controller, however am not sure if this is server authoritative or runs only on the local client if it does run only on the client would it be possible to circumvent this with a hacked client?

Kind regards
-Tom, P.S merry christmas!

Bump I really need an answer to this one!