The Print-O-Matic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'print-me' shortcode in all versions up to, and including, 2.1.10 due to insufficient input sanitization and output escaping on user supplied attributes such as 'tag'. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Twinpictures Print-O-Matic allows Stored XSS.This issue affects Print-O-Matic: from n/a through 2.1.10.

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.