CVE-2026-28065: ThemeREX Eject File Inclusion Vulnerability

CVE-2026-28065 Overview

CVE-2026-28065 is a Local File Inclusion (LFI) vulnerability affecting the ThemeREX Eject WordPress theme. The vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files on the server. This flaw is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program).

The vulnerability allows unauthenticated attackers to potentially read sensitive configuration files, access source code, and in certain configurations, achieve remote code execution through log poisoning or other advanced techniques.

Critical Impact

Attackers can exploit this LFI vulnerability to read sensitive files including WordPress configuration files (wp-config.php), potentially exposing database credentials, authentication keys, and other critical secrets that could lead to complete site compromise.

Affected Products

• ThemeREX Eject WordPress Theme versions through 2.17
• WordPress installations using the vulnerable Eject theme

Discovery Timeline

• 2026-03-05 - CVE-2026-28065 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-28065

Vulnerability Analysis

This vulnerability exists due to improper sanitization of user-controlled input that is subsequently used in PHP include() or require() statements. When user input is directly concatenated into file path parameters without adequate validation, attackers can manipulate the path to include files outside the intended directory structure.

The ThemeREX Eject theme fails to properly validate and sanitize filename parameters before using them in file inclusion operations. This allows attackers to traverse the file system using path traversal sequences (such as ../) to access files outside the web root or within sensitive directories.

Root Cause

The root cause of this vulnerability is insufficient input validation in the PHP code handling file inclusion operations. The Eject theme does not implement proper allowlisting of permitted files, path canonicalization, or blocking of directory traversal sequences. Without these protections, user-supplied input can directly influence which files the PHP interpreter loads and executes.

Attack Vector

The attack is network-based and can be exploited remotely without authentication. An attacker can craft malicious HTTP requests containing path traversal sequences to include arbitrary local files. The exploitation complexity depends on the server configuration and what files are accessible.

Typical exploitation involves:

1. Identifying the vulnerable parameter that accepts file inclusion input
2. Crafting a request with path traversal sequences to access sensitive files
3. Leveraging the file contents for further attacks, such as extracting database credentials from wp-config.php

In more advanced scenarios, attackers may chain this LFI with log poisoning techniques, where malicious PHP code is injected into server logs and then included via the vulnerable parameter to achieve code execution.

Detection Methods for CVE-2026-28065

Indicators of Compromise

• Suspicious HTTP requests containing path traversal patterns such as ../, ..%2f, or ....// in URL parameters or POST data
• Web server access logs showing attempts to access files outside normal theme directories
• Unusual file access patterns in PHP error logs indicating attempts to include system files
• Requests targeting theme files with abnormal query string parameters containing file paths

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block path traversal sequences in incoming requests
• Implement log monitoring for HTTP requests containing suspicious patterns like ../, encoded traversal sequences, or references to sensitive files
• Enable PHP error logging and monitor for file inclusion warnings or errors indicating attempted access to restricted files
• Use file integrity monitoring to detect unauthorized access to configuration files

Monitoring Recommendations

• Configure real-time alerting for requests matching LFI attack patterns targeting WordPress theme endpoints
• Monitor access to sensitive files such as wp-config.php, /etc/passwd, and other system configuration files
• Implement network-level monitoring for unusual outbound connections that may indicate successful exploitation and data exfiltration
• Review WordPress audit logs for any unauthorized administrative actions following potential exploitation

How to Mitigate CVE-2026-28065

Immediate Actions Required

• Update the ThemeREX Eject theme to the latest patched version immediately
• If no patch is available, consider temporarily disabling or replacing the Eject theme with a secure alternative
• Review web server access logs for signs of exploitation attempts
• Audit file permissions to restrict PHP's ability to read sensitive files outside the web root
• Implement a Web Application Firewall with rules specifically blocking path traversal attacks

Patch Information

Refer to the Patchstack security advisory for the latest information on patches and updates from ThemeREX. Site administrators should update to a version newer than 2.17 once a security fix is released by the vendor.

Workarounds

• Implement server-level PHP configuration to restrict include() and require() operations using open_basedir directive
• Deploy a WAF rule to block requests containing path traversal sequences targeting the Eject theme
• Disable the vulnerable theme and switch to an alternative until a patch is available
• Apply file system permissions to prevent the web server user from reading sensitive files outside the WordPress installation

# Example: Restrict PHP file operations using open_basedir
# Add to php.ini or Apache/Nginx configuration
# Replace /var/www/html with your WordPress installation path

php_admin_value open_basedir "/var/www/html:/tmp"