The Print-O-Matic WordPress plugin before 2.1.8 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.

The Print-O-Matic WordPress plugin before 2.0.3 does not escape some of its settings before outputting them in attribute, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.