Horion Command Block Exploit

The Horion Commandblockexploit is a Modul in a hackclient that alows you to open command blocks without permissions. The Modul is opening the gui and than you can change the command in it. Please fix this fast because the user of the client are destroying worlds because they can execute any command that are working in commandblocks. You can do sth like that you can only change the command if u have permission that are histsided/ serversided(on realms)