The TPG Get Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'tpg_get_posts' shortcode in all versions up to, and including, 3.6.5 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
https://wordpress.org/plugins/tpg-get-posts/
https://plugins.trac.wordpress.org/browser/tpg-get-posts/trunk/inc/class-tpg-gp-process.php#L478