One of the security fixes delivered with the patch is disallowing backend URLs not starting with /admin/ or with your custom backend path. ITORIS has been working on updating all extensions for the new security standard. All patches for SUPEE-6788 will be provided for free.
Below is the list of extensions currently compatible with SUPEE-6788, Magento CE 1.9.2.2, and Magento EE 1.14.2.2: