CVE-2026-4084
Received Received - Intake
Stored XSS in fyyd Podcast Shortcodes Plugin Allows Script Injection

Publication date: 2026-03-21

Last updated on: 2026-03-21

Assigner: Wordfence

Description
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.
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Meta Information
Published
2026-03-21
Last Modified
2026-03-21
Generated
2026-06-16
AI Q&A
2026-03-21
EPSS Evaluated
2026-06-15
NVD
CVE-2026-4084
EUVD
EUVD-2026-13994
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
fyyd fyyd_podcast_shortcodes_plugin to 0.3.1 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

The fyyd podcast shortcodes plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in all versions up to and including 0.3.1.

This vulnerability arises because user-supplied shortcode attributes like 'color', 'podcast_id', and 'podcast_slug' are not properly sanitized or escaped before being inserted into inline JavaScript code.

As a result, an attacker with Contributor-level access or higher can inject malicious scripts that will execute whenever a user views the affected page.

Impact Analysis

This vulnerability can allow an attacker to execute arbitrary JavaScript in the context of the affected website.

Such script execution can lead to theft of user credentials, session hijacking, defacement of the website, or distribution of malware to visitors.

Since the attacker needs Contributor-level access or above, the risk is limited to users with some level of authenticated access, but the impact can still be significant.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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