Heartbleed is a new vulnerability in the OpenSSL cryptographic software library that could allow a hacker to obtain the secret keys used with the SSL certificate on your website. All WordPress E-Commerce websites, and all legacy websites, were not prone this vulnerability because OpenSSL was not being used with those services. Clients running on the Magento platform were susceptible to this vulnerability but all Magento servers were patched early this morning.
You can read more about the Heartbleed vulnerability here:
You can also test your website yourself by following either of these two links:
As always please submit a Support Request if you have any questions. Thank you.