Security Advisory
A security issue has been found in all version prior to 2.1.4. This issue allows remote attackers to get read access to files hosted on your server on non-hardened php installations. You are facing this issue if :

   - You are running a version of the library prior to 2.1.4.
   - You have left the /examples folder on your production servers.

Even if it may sounds obvious, the examples directory should only be used for coders to better understand the library mechanics.

Resolution

The easiest way is to remove or rename the /examples folder of your installation.

If for any reason you need to keep this folder publicly accessible, you can download the 2.1.4 release that fix this issue.