CVE-2025-23728: AuMenu Plugin XSS Vulnerability

CVE-2025-23728 Overview

CVE-2025-23728 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the AuMenu WordPress plugin developed by atelierhyper. This vulnerability arises 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 occur when user-supplied input is immediately returned by the web application without proper sanitization or encoding. In the case of AuMenu, specially crafted requests containing malicious JavaScript can be reflected back to users, potentially enabling session hijacking, credential theft, or delivery of malicious payloads.

Critical Impact

Attackers can execute arbitrary JavaScript in authenticated user sessions, potentially compromising WordPress administrator accounts and gaining full control of affected websites.

Affected Products

• WordPress AuMenu plugin version 1.1.5 and earlier
• Websites using the atelierhyper AuMenu plugin for menu functionality
• WordPress installations with unpatched AuMenu deployments

Discovery Timeline

• 2025-03-26 - CVE-2025-23728 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-23728

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), which encompasses Cross-Site Scripting flaws. The AuMenu plugin fails to properly sanitize or encode user-controlled input before incorporating it into dynamically generated web pages.

When exploited, the vulnerability allows attackers to inject malicious scripts that execute within the security context of the affected WordPress site. Since the attack is reflected (non-persistent), exploitation typically requires social engineering to trick users into clicking malicious links containing the XSS payload.

The scope of this vulnerability extends beyond the vulnerable component itself, as successful exploitation can impact resources outside the security scope of the AuMenu plugin, including user sessions and browser storage.

Root Cause

The root cause of CVE-2025-23728 is insufficient input validation and output encoding within the AuMenu plugin. User-supplied data is processed and reflected back to the browser without proper sanitization, allowing script injection. The plugin lacks implementation of WordPress's built-in escaping functions such as esc_html(), esc_attr(), or wp_kses() that would prevent XSS attacks.

Attack Vector

The attack vector for this vulnerability is network-based and requires user interaction. An attacker would craft a malicious URL containing JavaScript payload embedded in a vulnerable parameter of the AuMenu plugin. The attack flow typically involves:

1. Attacker identifies a vulnerable input field or URL parameter in the AuMenu plugin
2. Attacker crafts a URL containing malicious JavaScript in the vulnerable parameter
3. Victim is tricked into clicking the malicious link (via phishing, social media, or compromised websites)
4. The AuMenu plugin reflects the malicious input without sanitization
5. The victim's browser executes the injected JavaScript in the context of the WordPress site

The vulnerability can be exploited to steal session cookies, perform actions on behalf of authenticated users, redirect users to malicious sites, or deface web content.

Detection Methods for CVE-2025-23728

Indicators of Compromise

• Suspicious URL parameters containing encoded JavaScript or HTML tags in requests to AuMenu plugin endpoints
• Web server logs showing requests with <script>, javascript:, onerror=, or similar XSS payloads
• User reports of unexpected browser behavior or redirects when interacting with menu functionality
• JavaScript errors in browser consoles indicating attempted code injection

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS payloads in URL parameters
• Monitor WordPress access logs for requests containing suspicious encoded characters such as %3Cscript%3E or %22onmouseover%3D
• Deploy Content Security Policy (CSP) headers to detect and report inline script execution attempts
• Use WordPress security plugins that scan for known vulnerable plugin versions

Monitoring Recommendations

• Enable verbose logging for the AuMenu plugin and WordPress core to capture suspicious requests
• Configure real-time alerting for requests matching XSS attack patterns targeting plugin directories
• Regularly audit installed WordPress plugins against vulnerability databases like Patchstack
• Monitor browser-side errors using JavaScript error tracking services that can detect XSS execution attempts

How to Mitigate CVE-2025-23728

Immediate Actions Required

• Audit your WordPress installation to identify if AuMenu version 1.1.5 or earlier is installed
• Consider temporarily deactivating the AuMenu plugin until a patched version is available
• Implement WAF rules to filter malicious input targeting the AuMenu plugin
• Review server logs for evidence of exploitation attempts

Patch Information

As of the CVE publication date, the vulnerability affects AuMenu versions through 1.1.5. Website administrators should check the Patchstack vulnerability database for updates on available patches. Contact the plugin developer atelierhyper for information on remediated versions.

WordPress administrators can check their installed plugin version by navigating to Plugins → Installed Plugins in the WordPress admin dashboard and locating AuMenu. Update to the latest available version if one has been released that addresses this vulnerability.

Workarounds

• Temporarily disable the AuMenu plugin if it is not critical to site functionality
• Implement strict Content Security Policy (CSP) headers to prevent inline script execution: Content-Security-Policy: script-src 'self';
• Deploy a Web Application Firewall with XSS protection rules enabled
• Restrict access to WordPress admin areas using IP allowlisting where feasible
• Consider using an alternative menu plugin until a patch is available

# Add CSP header in Apache .htaccess
Header set Content-Security-Policy "script-src 'self'; object-src 'none';"

# Add CSP header in Nginx configuration
add_header Content-Security-Policy "script-src 'self'; object-src 'none';";