In Select2 through 4.0.5, as used in Snipe-IT and other products, rich selectlists allow XSS. This affects use cases with Ajax remote data loading when HTML templates are used to display listbox data.
https://github.com/snipe/snipe-it/pull/6831/commits/5848d9a10c7d62c73ff6a3858edfae96a429402a