First of all THANK YOU! All contributions be it bug fix, reporting an issue or features request; we greatly appreciate your time which helps make CubeCart even better.
Please submit feature requests to http://features.cubecart.com.
If you are really keen to see a specific feature and don't want to wait, the great news is that we take bribes! Please contact our sales department via our helpdesk.
Please provide an overview of the issue with steps to reproduce. If you have forked CubeCart we appreciate pull requests to review. The GitHub issue tracker is NOT a source to seek technical support. Instead please contact our support staff via the helpdesk.
This is a sensitive area and we would request that they are not posted to GitHub publicly. Instead please submit your findings with proof of concept to our sale staff on the helpdesk.