The security department is the one that needs to whitelist the blog, there's nothing we can do to change chat. They are referring to the threats of a self-hosted WordPress.org. Your site is hosted on the WordPress.com platform. To clear up any confusion, WordPress.com and WordPress.org are two different entities.
Please check out the following links to learn the differences.
http://support.wordpress.com/com-vs-org/
Several other malware scanners rated your site as safe. I'd recommend passing this to the security department or contact ZScaler.