WordPress security links

Being based on the interaction among widgets, scripts and theme page templates built by many hands, WordPress sites can fall victim to hacks, pranks and destructive attacks.

While WordPress is amazingly easy to use, learn about its underlying JavaScript and PHP programming languages and SQL databases, and their vulnerabilities.

http://www.wpjedi.com/best-practices-to-keep-wordpress-secure/

http://blog.vaultpress.com/

http://net.tutsplus.com/category/tutorials/php/