Is there any way to make a kick stand silent during riding on uneven, stone roads and paths? I am actually refering to the "cube kick stand" for the "cube acid, kick stand ready, 2017" mtbike.
Presumably this is the stand you have: https://www.cube.eu/en/equipment/components/kickstands/product/cube-kickstand-cubestand-cmpt-black/
You need to determine what part of the kickstand is loose and moving when you go over bumps. You can inspect the stand, but also try dropping the bike onto it's tires from 6"/10cm off the ground. That's enough to reveal things that rattle. Bear in mind that something else may be rattling, it's hard to hear where noises come from when riding.
Perhaps the mechanism attaching the stand to the bike has come loose. Is the extendable leg rattling? If so maybe it can be solved by pushing the leg all the way in when you'll be riding bumpy roads.