Luanti (formerly Minetest) is an open source voxel game-creation platform. Starting in version 5.0.0 and prior to version 5.15.2,

Minetest is a free open-source voxel game engine with easy modding and game creation. In single player, a mod can set a global

In Minetest before 5.4.0, players can add or subtract items from a different player's inventory.

Minetest before 5.4.0 allows attackers to add or modify arbitrary meta fields of the same item stack as saved user input, aka Item