CVE-2025-47580: Front End Users Auth Bypass Vulnerability

CVE-2025-47580 Overview

CVE-2025-47580 is a Missing Authorization vulnerability affecting the Rustaurius Front End Users WordPress plugin, developed by Etoile Web Design. This security flaw allows attackers to exploit incorrectly configured access control security levels, potentially leading to sensitive data exposure and unauthorized access to protected resources. The vulnerability stems from CWE-862 (Missing Authorization), where the application fails to perform adequate authorization checks before granting access to protected functionality.

Critical Impact

This vulnerability enables unauthenticated remote attackers to bypass access controls and potentially access, modify, or delete sensitive user data managed by the Front End Users plugin, affecting confidentiality, integrity, and availability of affected WordPress installations.

Affected Products

• Etoile Web Design Front End Users plugin for WordPress versions up to and including 3.2.32
• WordPress installations running the vulnerable Front End Users plugin
• Any WordPress site utilizing the Front End Users plugin for user management functionality

Discovery Timeline

• 2025-05-15 - CVE-2025-47580 published to NVD
• 2025-08-12 - Last updated in NVD database

Technical Details for CVE-2025-47580

Vulnerability Analysis

The vulnerability exists in the Front End Users WordPress plugin's authorization mechanism. The plugin fails to properly validate user permissions before processing requests to access protected resources or functionality. This missing authorization check allows unauthenticated attackers to access functionality intended only for authenticated users or administrators.

The vulnerability is network-accessible, requires no authentication or user interaction, and has low attack complexity—making it trivial to exploit in real-world scenarios. Successful exploitation can result in complete compromise of the confidentiality, integrity, and availability of data managed by the plugin.

Root Cause

The root cause is CWE-862: Missing Authorization. The Front End Users plugin does not implement proper authorization checks in one or more of its endpoints or functions. When processing requests, the plugin fails to verify whether the requesting user has the necessary privileges to perform the requested action, allowing unauthorized access to sensitive functionality and data.

Attack Vector

The attack vector is network-based, allowing remote exploitation without requiring any authentication credentials. An attacker can craft HTTP requests directly to vulnerable plugin endpoints, bypassing access control mechanisms that should restrict access to authenticated or privileged users only.

The exploitation flow involves:

1. Attacker identifies WordPress installations running the vulnerable Front End Users plugin
2. Attacker sends crafted requests to vulnerable plugin endpoints
3. Due to missing authorization checks, the plugin processes requests without validating user permissions
4. Attacker gains unauthorized access to protected user data or administrative functionality

For technical details regarding the exploitation mechanism, refer to the Patchstack WordPress Vulnerability Advisory.

Detection Methods for CVE-2025-47580

Indicators of Compromise

• Unusual or unauthorized access to Front End Users plugin endpoints from external IP addresses
• Unexpected data access patterns or bulk retrieval of user information from the plugin
• Access logs showing requests to plugin-specific AJAX endpoints without proper authentication headers
• Database queries or changes affecting Front End Users plugin tables from non-administrative sessions

Detection Strategies

• Monitor web server access logs for suspicious requests targeting /wp-content/plugins/front-end-only-users/ paths
• Implement Web Application Firewall (WAF) rules to detect authorization bypass attempts against WordPress plugin endpoints
• Configure WordPress security plugins to alert on unauthorized access to user management functionality
• Deploy SentinelOne Singularity to detect post-exploitation activities and lateral movement attempts

Monitoring Recommendations

• Enable detailed logging for the Front End Users plugin and WordPress authentication events
• Set up alerts for failed authentication attempts followed by successful access to protected resources
• Monitor for unusual patterns of access to user data that may indicate automated exploitation
• Regularly audit plugin access logs to identify potential unauthorized access attempts

How to Mitigate CVE-2025-47580

Immediate Actions Required

• Update the Front End Users plugin to a version newer than 3.2.32 if a patched version is available from the vendor
• If no patch is available, consider temporarily disabling the Front End Users plugin until a fix is released
• Implement additional access controls at the web server or WAF level to restrict access to plugin endpoints
• Review access logs for any signs of prior exploitation and assess potential data exposure
• Audit user accounts managed by the plugin for any unauthorized changes or access

Patch Information

Organizations should check the official WordPress plugin repository and the Patchstack WordPress Vulnerability Advisory for the latest patch information from Etoile Web Design. Update to the latest available version that addresses this vulnerability.

Workarounds

• Temporarily disable the Front End Users plugin if it is not critical to business operations
• Implement server-level access restrictions to limit access to plugin endpoints to authenticated administrators only
• Deploy a Web Application Firewall with custom rules to block suspicious requests to the plugin's endpoints
• Use WordPress security plugins with virtual patching capabilities to provide temporary protection
• Restrict access to the WordPress admin area and plugin functionality to trusted IP addresses only

# Apache .htaccess configuration to restrict access to plugin directory
<Directory "/var/www/html/wp-content/plugins/front-end-only-users">
    Order Deny,Allow
    Deny from all
    # Allow only from trusted IP addresses
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Directory>