CMS blocks disappear after version 1.9.2.2 upgrade or SUPEE-6788 patch

Magento version 1.9.2.2 and patch SUPEE-6788 both introduce a new security feature to Magento. Blocks on the front-end have to be enabled or whitelisted before it will work.

Blocks can be added via a new Admin Panel section under Permissions > Blocks. Adding or allowing a new block is pretty streight forward:

1. Navigate to System > Permissions > Blocks
2. Click “Add New Block”
3. Enter the block name: e.g. cms/block*
4. Set “Is Allowed” to Yes

• Replace this with the name of the block that has disappeared