One of the most hackable plugins. DO NOT USE!

This plugin is not secure. It will act like a backdoor and all registered users of your blog will have FULL access to your databases.

I strongly recommend you not to use it until all issues will be addressed by the plugin author(s).

you can read more here: http://coderevision.com/portable-phpmyadmin-wordpress-plugin/

http://wordpress.org/extend/plugins/portable-phpmyadmin/