I've recently discovered an oversight in a popular games config file system that allows you to use an item even if you haven't yet unlocked it, this is a multiplayer game where players are expected to reach a level where they will then be able to use said item. The 'exploit' works by adding an entry to a ini file with the ID of the restricted item, it appears that the item is only restricted when trying to add the item rather than when loading it from the file.
My plan is to develop and sell a tool that will give players the ability to unlock the item, I would like to know if this is legal to do providing I include a disclaimer that it could be patched at any point?
I am not modifying any code of the game itself I am just making use of an oversight by the developer.