The News and Blog Designer Bundle plugin for WordPress contains a Local File Inclusion vulnerability in all versions up to 1.1. The vulnerability exists in the template parameter and allows unauthenticated attackers to include and execute arbitrary PHP files on the server. This can lead to execution of malicious PHP code, bypassing access controls, obtaining sensitive data, or achieving code execution when PHP files can be uploaded and included. The vulnerability affects the plugin's AJAX functionality and poses a high security risk.