In affected versions of Octopus Deploy users of certain browsers using AD to sign-in to Octopus Server were able to bypass authentication checks and be redirected to the configured redirect url without any validation.
In affected versions of Octopus Deploy it is possible for certain types of sensitive variables to inadvertently become unmasked when viewed in variable preview.
In affected versions of Octopus Server it is possible to reveal information about teams via the API due to an Insecure Direct Object Reference (IDOR) vulnerability