Magento recently released a security update that fixes many vulnerabilities found in their software. If you are running a Magento installation without patch SUPEE-6285 we highly recommend you update immediately:
https://www.magentocommerce.com/products/downloads/magento/
If you are a customer with us, we will be in contact if this issue affects your account.
For more information on the security vulnerabilities fixed in this update, please visit the following link: