The Pods – Custom Content Types and Fields plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'not_found' Shortcode Attribute in all versions up to, and including, 3.3.9.1 due to insufficient input sanitization and output escaping. 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://plugins.trac.wordpress.org/changeset?reponame=&old=3674726%40pods&new=3674726%40pods
https://plugins.trac.wordpress.org/browser/pods/tags/3.3.9.1/includes/general.php#L2539
https://plugins.trac.wordpress.org/browser/pods/tags/3.3.9.1/includes/general.php#L2535
https://plugins.trac.wordpress.org/browser/pods/tags/3.3.9.1/includes/general.php#L1399
https://plugins.trac.wordpress.org/browser/pods/tags/3.3.9.1/classes/PodsInit.php#L514