CVE-2025-23632: CG Button Reflected XSS Vulnerability

CVE-2025-23632 Overview

CVE-2025-23632 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the CG Button (content-glass-button) WordPress plugin developed by Rhizome Networks. This 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.

Reflected XSS vulnerabilities are particularly dangerous in WordPress environments because they can be leveraged to steal administrator session cookies, perform unauthorized actions on behalf of authenticated users, or redirect visitors to malicious websites. When an administrator visits a crafted malicious link, the attacker can potentially gain full control of the WordPress installation.

Critical Impact

Attackers can execute arbitrary JavaScript in victim browsers, potentially leading to session hijacking, credential theft, defacement, or malware distribution through compromised WordPress sites.

Affected Products

• Rhizome Networks CG Button (content-glass-button) plugin version 1.0.5.6 and earlier
• WordPress installations running vulnerable versions of the CG Button plugin

Discovery Timeline

• 2025-03-26 - CVE-2025-23632 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-23632

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), which encompasses Cross-Site Scripting weaknesses. The flaw exists because the CG Button plugin fails to properly sanitize user-supplied input before reflecting it back in the generated HTML response.

In WordPress plugin development, reflected XSS typically occurs when URL parameters or form inputs are echoed back to the page without adequate encoding or escaping. The plugin likely processes certain request parameters and includes them directly in the page output, creating an injection point for malicious scripts.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding within the CG Button plugin. WordPress provides several functions for escaping output (such as esc_html(), esc_attr(), and wp_kses()) that should be used whenever user-controlled data is rendered in HTML contexts. The vulnerable code path in this plugin fails to apply these security measures, allowing attacker-controlled content to be interpreted as executable script code by the browser.

Attack Vector

The attack requires network access and user interaction to exploit. An attacker crafts a malicious URL containing JavaScript payload in a vulnerable parameter. When a victim (ideally a WordPress administrator) clicks this link, the malicious script executes in their browser session with the privileges of the logged-in user.

The attack scenario typically involves:

1. Attacker identifies the vulnerable parameter in the CG Button plugin
2. Attacker crafts a URL with embedded JavaScript payload
3. Attacker delivers the malicious link via phishing email, social media, or compromised website
4. Victim clicks the link while authenticated to their WordPress site
5. Malicious script executes, potentially stealing session tokens or performing administrative actions

For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-23632

Indicators of Compromise

• Suspicious URL parameters in web server access logs containing JavaScript code or HTML tags
• Unusual outbound connections from client browsers after visiting WordPress pages
• Reports of unexpected redirects or pop-ups from site visitors
• Modified WordPress user accounts or settings following administrator activity

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block XSS payloads in URL parameters
• Monitor web server logs for requests containing encoded script tags or JavaScript event handlers
• Deploy browser-based security monitoring to detect unauthorized script execution
• Use WordPress security plugins that scan for known vulnerable plugin versions

Monitoring Recommendations

• Enable detailed access logging on web servers hosting WordPress installations
• Configure alerts for requests matching XSS attack patterns targeting the CG Button plugin
• Monitor WordPress admin activity logs for suspicious actions following external referrer visits
• Implement Content Security Policy (CSP) headers to mitigate successful XSS exploitation

How to Mitigate CVE-2025-23632

Immediate Actions Required

• Audit WordPress installations for the presence of CG Button plugin versions 1.0.5.6 or earlier
• Consider temporarily deactivating the CG Button plugin until a patched version is available
• Implement WAF rules to filter malicious input targeting the vulnerable plugin
• Review administrator session activity for signs of compromise
• Educate WordPress administrators about phishing risks and suspicious link handling

Patch Information

At the time of publication, administrators should check for updates to the CG Button plugin through the WordPress plugin repository. If no patched version is available, consider removing the plugin or implementing the workarounds described below. Monitor the Patchstack Vulnerability Report for updates on patch availability.

Workarounds

• Deactivate and remove the CG Button plugin if functionality is not critical
• Implement strict Content Security Policy headers to prevent inline script execution
• Deploy a Web Application Firewall with XSS filtering capabilities
• Restrict WordPress admin access to trusted IP addresses
• Use browser extensions that block suspicious script execution for administrators

# WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate content-glass-button

# Add Content Security Policy header in .htaccess (Apache)
# Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';"