In affected versions of Octopus Server it was identified that when a sensitive value is a substring of another value, sensitive value masking will only partially work.
In affected versions of Octopus Deploy it is possible to reveal the Space ID of spaces that the user does not have access to view in an error message when a resource is part of another Space.
In affected versions of Octopus Server an Insecure Direct Object Reference vulnerability exists where it is possible for a user to download Project Exports from a Project they do not have permissions to access. This vulnerability only impacts projects within the same Space.