The DK PDF plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 1.9.6.
The DK PDF – WordPress PDF Generator plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.3.0 via the 'addContentToMpdf' function.