Magento Community Edition, 1.9.1.1 corrects a remote code execution vulnerability that makes it possible for unauthorized persons to gain access to your store. In February of this year, we released patch SUPEE-5344 to correct the problem. That patch is incorporated into this release.

Important! To protect your store, you must either upgrade to Magento Community 1.9.1.1 or install the SUPEE-5344 patch.