In Craft CMS through 3.1.7, the elevated session password prompt was not being rate limited like normal login forms, leading to the possibility of a brute force attempt on them.
In some circumstances, Craft 2 before 2.7.10 and 3 before 3.2.6 wasn't stripping EXIF data from user-uploaded images when it was configured to do so, potentially exposing personal/geolocation data to the public.