Developing a secure front end posting form

I want to add a front end posting functionality to one of my WordPress sites. For more control and for more understanding of how this works (I am not a professional programmer) I choosed to use as a base for future development a solution from the wpkb.com site (see the bellow code). This solution works, but the question is how it is protected against security issues/malicious attacks?

WP_Query Pagination on single-custom.php

What I am looking to do: Setup WP_Query pagination in a single-custom-post-type.php template file What I have done 1) Created a post type called “authors”. Each post within that post type is an individual author. 2) Standard edit post screen pages contain a dropdown which lists all posts (authors) from the authors custom post type. … Read more