What the vulnerability does
01Description
The fyyd podcast shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'fyyd-podcast', 'fyyd-episode', and 'fyyd' shortcodes in all versions up to, and including, 0.3.1. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes such as 'color', 'podcast_id', and 'podcast_slug'. These attributes are directly concatenated into inline JavaScript within single-quoted string arguments without any escaping or sanitization, allowing an attacker to break out of the JavaScript string context. 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.
Explanation of Vulnerability in Simple Terms
02Summary
The fyyd podcast shortcodes plugin contains a cross-site scripting (XSS) vulnerability in versions up to 0.3.1. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, including site administrators. The vulnerability has scope change, meaning the impact extends beyond the vulnerable component itself.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers, potentially stealing session tokens or admin credentials.
Potential impact on your site
04Site Impact
Any authenticated user can inject scripts affecting other users and admins; could lead to account takeover or site compromise.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege authenticated account on the site; no user interaction required.
Key dates
06Disclosure timeline
March 21, 2026
CVE published
April 8, 2026
Record updated
