{{base_url}} is not recommended to use in a production environment to declare the Base Unsecure URL / Base Secure URL. It is highly recommended to change this value in your Magento configuration.
Vulnerable configuration:

Correct configuration:

– See more at: http://www.magentocommerce.com/blog/comments/security-update-for-magento-base-url-configuration-value/#sthash.VUSowHXK.dpuf
然后还要将 secure 的base URL 改为网站网址,这样就不会出现以上提示了