https://discourse.modsinexile.com/faq#stealing
Does this apply to content made by one of the game developers?
Example case:
I have a stripped down version of Josh Sawyer’s jsawyer.esp for Fallout: New Vegas for a very specific feature with some minor tweaks. Is this something that is not allowed?
If it is a modified copy of the Jsawyer.esp file, then no; the original Jsawyer mod was released under a license restricting its distribution to diogeneslamp only.
If, however, it is a patch for it, or a made from scratch mod that replicates the functions (like the Jsawyer ultimate edition), then it could be hosted. Permission from J. Sawyer himself would be required otherwise.