Board Thread:News and Announcements/@comment-26888709-20171224002654/@comment-27219153-20171224031030

"If you make any content available on or through our Game, you agree to give us permission to use, copy, modify, adapt, distribute, and publicly display that content. This permission is irrevocable, and you also agree to let us permit other people to use, copy, modify, adapt, distribute, and publicly display your content. You are not giving up your ownership rights in your content, you are just giving us and other users permission to use it."

- Minecraft EULA

Perhaps I am interpreting this incorrectly, but it seems that any public mods are permitted to be used and edited by anyone.