CVE-2025-59584 Overview
CVE-2025-59584 is a DOM-Based Cross-Site Scripting (XSS) vulnerability in the PenciDesign Penci Podcast plugin for WordPress. The flaw stems from improper neutralization of input during web page generation [CWE-79]. It affects all versions of Penci Podcast up to and including 1.6.
An authenticated attacker with low privileges can inject malicious script content that executes in a victim's browser after user interaction. Successful exploitation allows script execution in the context of the affected site, enabling session token theft, unauthorized actions on behalf of victims, or redirection to attacker-controlled resources.
Critical Impact
Attackers can execute arbitrary JavaScript in the browsers of users visiting affected WordPress sites, leading to session compromise and content manipulation within the site's security context.
Affected Products
- PenciDesign Penci Podcast WordPress Plugin versions up to and including 1.6
- WordPress sites using the penci-podcast plugin
- Any WordPress installation with vulnerable Penci Podcast plugin active
Discovery Timeline
- 2025-09-22 - CVE-2025-59584 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-59584
Vulnerability Analysis
CVE-2025-59584 is a DOM-Based XSS vulnerability classified under [CWE-79], Improper Neutralization of Input During Web Page Generation. Unlike reflected or stored XSS variants, DOM-Based XSS occurs entirely within client-side JavaScript. The Penci Podcast plugin processes untrusted input in the browser and writes it into the Document Object Model without proper sanitization or encoding.
Exploitation requires authenticated access with at least contributor-level privileges and user interaction. When a targeted user loads a page containing attacker-supplied content, embedded script executes in their browser session. The scope-change indicator in the vulnerability's classification reflects that the injected script can affect resources beyond the plugin itself, including the parent WordPress site.
Root Cause
The vulnerability originates in client-side JavaScript that consumes URL parameters, fragment identifiers, or plugin-controlled data attributes without applying safe DOM manipulation. The plugin likely uses sinks such as innerHTML, document.write, or jQuery .html() on values derived from attacker-influenced sources. No output encoding or context-aware escaping is applied before the data reaches the DOM sink.
Attack Vector
An attacker with low-privileged authenticated access crafts a podcast entry, shortcode, or plugin field containing malicious markup. The attacker then lures a higher-privileged user, editor or administrator, to interact with the malicious content. When the victim's browser renders the page, the plugin's client-side code injects the payload into the DOM, triggering script execution.
The vulnerability is described in the Patchstack XSS Vulnerability Report. Refer to the advisory for additional technical context.
Detection Methods for CVE-2025-59584
Indicators of Compromise
- Unexpected <script> tags or event handlers appearing in podcast plugin content fields stored in the WordPress database.
- Outbound HTTP requests from administrator browsers to unfamiliar domains shortly after loading podcast plugin pages.
- Unauthorized WordPress admin actions such as new administrator accounts or plugin installations.
- Modified WordPress options or theme files following administrator sessions.
Detection Strategies
- Inspect WordPress database tables wp_posts and wp_postmeta for entries related to the Penci Podcast plugin containing HTML event handlers or <script> fragments.
- Deploy web application firewall rules that identify XSS payload patterns in requests targeting penci-podcast endpoints.
- Monitor browser Content Security Policy violation reports for script execution on WordPress admin pages.
Monitoring Recommendations
- Log and review all contributor and author account activity on WordPress sites running the Penci Podcast plugin.
- Alert on installation of new plugins, theme edits, or user role changes performed shortly after podcast content edits.
- Track HTTP requests to plugin AJAX endpoints for anomalous parameter values containing script-related keywords.
How to Mitigate CVE-2025-59584
Immediate Actions Required
- Deactivate the Penci Podcast plugin on all WordPress sites until a patched version is confirmed available and installed.
- Audit existing podcast plugin content for injected scripts and remove any malicious entries.
- Rotate WordPress administrator passwords and invalidate active sessions to mitigate potential session theft.
- Restrict contributor and author role assignments to trusted users only.
Patch Information
At the time of publication, the vulnerability affects Penci Podcast versions up to and including 1.6. Site administrators should monitor the Patchstack XSS Vulnerability Report and the PenciDesign vendor channels for a fixed release, then apply the update promptly.
Workarounds
- Deploy a web application firewall with XSS filtering rules covering the plugin's URL paths and query parameters.
- Implement a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.
- Remove the plugin entirely if podcast functionality is not required for the site.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
