When generating a user invitation code in Octopus Server, the validity of this code can be set for a specific number of users. It was possible to bypass this restriction of validity to create extra user accounts above the initial number of invited users.

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

In affected versions of Octopus Deploy, there is no logging of changes to artifacts within Octopus Deploy.

In affected versions of Octopus Deploy it is possible to unmask sensitive variables by using variable preview.