In affected versions of Octopus Server where access is managed by an external authentication provider, it was possible that the API key/keys of a disabled/deleted user were still valid after the access was revoked.

In affected versions of Octopus Server it is possible to use the Git Connectivity test function on the VCS project to initiate an SMB request resulting in the potential for an NTLM relay attack.

In affected versions of Octopus Deploy it is possible to perform a Regex Denial of Service via the package upload function.

In affected versions of Octopus Deploy it is possible to perform a Regex Denial of Service targeting the build information request validation.

In affected versions of Octopus Deploy it is possible to perform a Regex Denial of Service using the Variable Project Template.

In affected versions of Octopus Server it is possible for target discovery to print certain values marked as sensitive to log files in plaint-text in when verbose logging is enabled.

In affected versions of Octopus Deploy it is possible to upload a package to built-in feed with insufficient permissions after re-indexing packages.

In affected versions of Octopus Server the help sidebar can be customized to include a Cross-Site Scripting payload in the support link.

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.

In affected versions of Octopus Server it was identified that a session cookie could be used as the CSRF token

In affected versions of Octopus Server it was identified that the same encryption process was used for both encrypting session cookies and variables.

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 unmask sensitive variables by using variable preview.