CVE-2025-53205: Radio Player Shoutcast XSS Vulnerability

CVE-2025-53205 Overview

CVE-2025-53205 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the Radio Player Shoutcast & Icecast WordPress plugin developed by LambertGroup. The vulnerability stems from improper neutralization of input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session.

Critical Impact

Attackers can exploit this Reflected XSS vulnerability to steal session cookies, hijack user accounts, deface websites, or redirect users to malicious sites. WordPress administrators and authenticated users visiting crafted malicious links are at risk.

Affected Products

• Radio Player Shoutcast & Icecast WordPress Plugin versions up to and including 4.4.7
• WordPress installations with the lbg-audio4-html5-shoutcast plugin enabled

Discovery Timeline

• 2025-08-20 - CVE-2025-53205 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-53205

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). The Radio Player Shoutcast & Icecast plugin fails to properly sanitize user-supplied input before reflecting it back in the HTML response. This allows an attacker to craft a malicious URL containing JavaScript code that executes when a victim clicks the link.

Reflected XSS attacks require user interaction—typically clicking a malicious link delivered via phishing emails, social media, or compromised websites. Once clicked, the injected script executes with the same privileges as the victim, enabling session theft, credential harvesting, or further attack propagation within the WordPress environment.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and output encoding within the plugin's request handling logic. User-controlled parameters are incorporated into the page response without proper sanitization, allowing HTML and JavaScript injection. The plugin fails to implement proper escaping functions such as esc_html(), esc_attr(), or wp_kses() that WordPress provides for secure output handling.

Attack Vector

The attack vector is network-based, requiring no authentication and low complexity to exploit. An attacker crafts a URL containing malicious JavaScript payload targeting the vulnerable plugin endpoint. When a victim with an active WordPress session clicks the link, the script executes in their browser context. This can lead to session cookie theft, administrative account compromise, or unauthorized actions performed on behalf of the victim.

The exploitation typically involves:

1. Identifying the vulnerable parameter in the plugin's request handling
2. Crafting a URL with an embedded JavaScript payload
3. Delivering the malicious URL to potential victims via social engineering
4. Capturing credentials or session tokens when the payload executes

Detection Methods for CVE-2025-53205

Indicators of Compromise

• Unusual URL patterns in web server logs containing encoded JavaScript or HTML tags in query parameters
• Requests to WordPress plugin endpoints with suspicious characters such as <script>, javascript:, or encoded variants
• Unexpected outbound connections from user browsers to unknown external domains following plugin page visits
• Reports from users of unexpected redirects or pop-ups when accessing radio player functionality

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS payloads in request parameters
• Monitor web server access logs for requests containing URL-encoded script tags or event handlers
• Deploy browser-based Content Security Policy (CSP) headers to prevent inline script execution
• Utilize security scanning tools to identify vulnerable plugin versions in WordPress installations

Monitoring Recommendations

• Enable WordPress audit logging to track plugin-related requests and potential exploitation attempts
• Configure alerts for anomalous patterns in request parameters targeting the lbg-audio4-html5-shoutcast plugin
• Review HTTP referrer headers for malicious domains attempting to deliver XSS payloads
• Monitor for new user accounts or privilege changes that could indicate post-exploitation activity

How to Mitigate CVE-2025-53205

Immediate Actions Required

• Update the Radio Player Shoutcast & Icecast plugin to a patched version when available from LambertGroup
• If no patch is available, consider temporarily disabling the lbg-audio4-html5-shoutcast plugin until remediation is provided
• Implement Content Security Policy (CSP) headers to restrict inline script execution
• Deploy a Web Application Firewall with XSS detection rules enabled
• Educate users about the risks of clicking unknown or suspicious links

Patch Information

Review the Patchstack XSS Vulnerability Report for detailed patch information and updates. Monitor the WordPress plugin repository for updated versions of the Radio Player Shoutcast & Icecast plugin that address this vulnerability. Organizations should subscribe to security advisories from Patchstack and LambertGroup for notification of available fixes.

Workarounds

• Implement strict Content Security Policy headers to block inline JavaScript execution and mitigate XSS impact
• Use a Web Application Firewall to filter requests containing XSS payloads before they reach the application
• Restrict access to the plugin's functionality to authenticated users only where feasible
• Consider using an alternative radio player plugin until the vulnerability is patched

# Example Content Security Policy header configuration for Apache
# Add to .htaccess or Apache configuration file
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'self';"

# For Nginx, add to server block
# add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'self';";