The Seriously Simple Podcasting 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, 3.5.0. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

The Seriously Simple Podcasting WordPress plugin before 3.3.0 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Castos Seriously Simple Podcasting allows Reflected XSS.This issue affects Seriously Simple Podcasting: from n/a through 3.0.2.

The Seriously Simple Podcasting WordPress plugin before 3.0.0 discloses the Podcast owner's email address (which by default is the admin email address) via an unauthenticated crafted request.

The Seriously Simple Podcasting WordPress plugin before 2.19.1 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.

Cross-Site Request Forgery (CSRF) vulnerability in Seriously Simple Podcasting plugin <= 2.16.0 at WordPress, leading to plugin settings change.