Hackers have recently skimmed credit card details from scores of NZ online stores. These include sports and book stores and online pharmacies. Worldwide there are around 6000+ sites affected by this malware.
The hack exploits a vulnerability in unpatched Magento Shopping carts on sites.
If you think you have purchased from a site which uses a Magento shopping card, contact your bank. If your site uses Magento as it’s shopping cart back end contact your developer.
And if you are using any other shopping cart on your site check to make sure that it is fully up to date and secure.