CVE-2025-2505: Age Gate WordPress Plugin RCE Vulnerability

CVE-2025-2505 Overview

The Age Gate plugin for WordPress contains a critical Local PHP File Inclusion (LFI) vulnerability affecting all versions up to and including 3.5.3. The vulnerability exists in the lang parameter, which fails to properly validate user-supplied input before including PHP files. This allows unauthenticated attackers to include and execute arbitrary PHP files on the server, potentially leading to complete site compromise.

Critical Impact

Unauthenticated attackers can achieve remote code execution by exploiting the LFI vulnerability to include malicious PHP files, bypassing access controls and potentially taking complete control of the WordPress installation.

Affected Products

• Age Gate WordPress Plugin versions up to and including 3.5.3
• WordPress installations running vulnerable Age Gate plugin versions

Discovery Timeline

• 2025-03-20 - CVE-2025-2505 published to NVD
• 2025-03-20 - Last updated in NVD database

Technical Details for CVE-2025-2505

Vulnerability Analysis

This Local File Inclusion vulnerability stems from improper input validation in the Age Gate plugin's Settings.php file. The vulnerable code accepts a lang parameter that is used to construct a file path for including PHP files without adequate sanitization. Because the plugin fails to restrict which files can be included, attackers can manipulate this parameter to include arbitrary PHP files present on the server.

The vulnerability is particularly dangerous because it requires no authentication to exploit. An attacker can craft a malicious request that traverses directories and includes sensitive PHP files, potentially including uploaded files that contain malicious code. This attack pattern can be used to bypass access controls, extract sensitive configuration data (including database credentials), or achieve full remote code execution when combined with file upload capabilities.

Root Cause

The root cause is a classic CWE-22 (Path Traversal) issue where the lang parameter in Settings.php is passed directly to a file inclusion function without proper validation or sanitization. The vulnerable code at line 27 of Settings.php accepts user-controlled input that influences which PHP file gets included, allowing attackers to break out of the intended directory structure using path traversal sequences.

Attack Vector

The attack is network-based and can be executed remotely by any unauthenticated user. An attacker sends a specially crafted HTTP request to the WordPress site with a manipulated lang parameter containing directory traversal sequences (such as ../) to navigate the file system and include arbitrary PHP files.

When combined with "safe" file uploads (images that contain embedded PHP code), this vulnerability can be escalated to achieve arbitrary code execution. The attacker can upload an image containing PHP code, then use the LFI vulnerability to include and execute that file, gaining complete control over the web server.

Detection Methods for CVE-2025-2505

Indicators of Compromise

• Unusual HTTP requests to WordPress containing path traversal sequences in the lang parameter (e.g., ../, ..%2f, %2e%2e/)
• Web server logs showing attempts to access files outside the plugin's expected directories
• Unexpected PHP file inclusions or executions in WordPress error logs
• Modified or newly created PHP files in upload directories

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in request parameters
• Monitor WordPress access logs for requests containing encoded or plain directory traversal sequences targeting the Age Gate plugin
• Deploy file integrity monitoring to detect unauthorized modifications to PHP files
• Review server logs for unusual file access patterns, particularly in the wp-content/uploads directory

Monitoring Recommendations

• Enable verbose logging for the Age Gate plugin and WordPress core to capture detailed request information
• Set up real-time alerting for requests containing path traversal signatures targeting plugin endpoints
• Monitor for unexpected outbound connections that may indicate post-exploitation activity
• Track file system changes in WordPress directories using integrity monitoring solutions

How to Mitigate CVE-2025-2505

Immediate Actions Required

• Update the Age Gate plugin to the patched version (version released in changeset 3258075)
• If immediate patching is not possible, temporarily deactivate the Age Gate plugin until the update can be applied
• Review server logs for any signs of exploitation attempts
• Conduct a security audit of the WordPress installation to identify any signs of compromise

Patch Information

The vulnerability has been addressed in the Age Gate plugin. The fix is documented in WordPress Changeset #3258075. Administrators should update to the latest version of the plugin through the WordPress admin dashboard or by downloading directly from the WordPress plugin repository. For detailed vulnerability information, refer to the Wordfence Vulnerability Report.

Workarounds

• Temporarily disable the Age Gate plugin until a patched version can be installed
• Implement WAF rules to block requests containing path traversal patterns in the lang parameter
• Restrict file permissions on the WordPress installation to limit the impact of potential exploitation
• Consider implementing additional security plugins that provide real-time threat detection and blocking capabilities

# Temporarily disable the Age Gate plugin via WP-CLI
wp plugin deactivate age-gate

# After updating, verify the plugin version
wp plugin list --name=age-gate --fields=name,version,status

# Check for suspicious access patterns in logs
grep -E "lang=.*\.\./" /var/log/apache2/access.log