CVE-2026-28045: N7 Golf Club Local File Inclusion Flaw

CVE-2026-28045 Overview

CVE-2026-28045 is a PHP Local File Inclusion (LFI) vulnerability affecting the ThemeREX N7 | Golf Club Sports & Events WordPress theme. The vulnerability stems from improper control of filename parameters used in PHP include/require statements (CWE-98), allowing attackers to include arbitrary local files from the server.

This vulnerability enables unauthenticated remote attackers to read sensitive files from the web server, potentially exposing configuration files, credentials, and other sensitive data. In certain configurations, attackers may be able to escalate the LFI to achieve remote code execution through techniques such as log poisoning or PHP wrapper abuse.

Critical Impact

Remote attackers can exploit this LFI vulnerability to read arbitrary files from the server, potentially leading to sensitive data exposure, credential theft, and in some cases, remote code execution.

Affected Products

• ThemeREX N7 | Golf Club Sports & Events WordPress Theme versions up to and including 2.16.0
• WordPress installations using the vulnerable n7-golf-club theme

Discovery Timeline

• 2026-03-05 - CVE-2026-28045 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-28045

Vulnerability Analysis

This vulnerability exists due to improper validation and sanitization of user-controlled input that is passed to PHP file inclusion functions such as include(), include_once(), require(), or require_once(). The N7 Golf Club theme fails to adequately restrict the file paths that can be included, allowing attackers to traverse directories and include arbitrary local files.

Local File Inclusion vulnerabilities in PHP applications are particularly dangerous because they can be chained with other techniques to achieve more severe impacts. While the immediate risk is information disclosure (reading sensitive files like /etc/passwd, wp-config.php, or other configuration files), attackers may leverage techniques such as PHP wrappers (php://filter, php://input), log file poisoning, or session file manipulation to escalate the attack to remote code execution.

The vulnerability is accessible over the network without requiring authentication or user interaction, though exploitation complexity is considered high due to the specific conditions required for successful attacks.

Root Cause

The root cause of CVE-2026-28045 is insufficient input validation in the WordPress theme's file handling logic. The theme accepts user-supplied input that influences file path construction for PHP include statements without properly sanitizing or restricting the allowed paths. This allows directory traversal sequences (such as ../) to escape the intended directory and access files elsewhere on the filesystem.

Attack Vector

The attack vector is network-based, allowing remote unauthenticated attackers to exploit the vulnerability. An attacker can craft malicious HTTP requests containing path traversal sequences to include arbitrary files from the server's filesystem. The attack flow typically involves:

1. Identifying a vulnerable parameter that accepts file path input
2. Crafting a request with directory traversal sequences (e.g., ../../../etc/passwd)
3. The server includes the specified file, returning its contents or executing it as PHP code
4. Extracting sensitive information or achieving code execution depending on the included file

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

Detection Methods for CVE-2026-28045

Indicators of Compromise

• Unusual HTTP requests containing path traversal sequences (../, ..%2f, %2e%2e/) in URL parameters
• Access log entries showing requests attempting to include sensitive files like /etc/passwd or wp-config.php
• PHP error logs indicating failed file inclusion attempts or unexpected file paths
• Requests containing PHP wrapper strings such as php://filter or php://input

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in HTTP requests
• Monitor access logs for requests containing directory traversal sequences targeting theme files
• Deploy intrusion detection signatures for PHP Local File Inclusion attack patterns
• Review PHP error logs for include/require failures with unexpected file paths

Monitoring Recommendations

• Enable verbose logging for the WordPress installation and PHP error reporting
• Set up alerts for repeated 404 errors or PHP warnings related to file inclusion
• Monitor for unusual file access patterns on the web server, particularly to sensitive configuration files
• Implement file integrity monitoring on critical WordPress files and directories

How to Mitigate CVE-2026-28045

Immediate Actions Required

• Update the N7 | Golf Club Sports & Events theme to a patched version when available from ThemeREX
• If no patch is available, consider temporarily disabling or replacing the vulnerable theme
• Implement WAF rules to block path traversal attempts targeting the theme
• Review server access logs for signs of exploitation attempts
• Restrict file permissions on sensitive server files to limit potential impact

Patch Information

At the time of publication, administrators should check the Patchstack Vulnerability Report for the latest patch status and vendor response. Update the theme to the latest version available from ThemeREX once a security patch has been released.

Workarounds

• Deploy a Web Application Firewall with rules configured to block directory traversal and LFI attack patterns
• Temporarily switch to an alternative WordPress theme if the vulnerable theme is not critical to operations
• Implement PHP open_basedir restrictions to limit file access scope for the WordPress installation
• Use WordPress security plugins that provide real-time protection against file inclusion attacks

# Example Apache .htaccess rules to block common LFI patterns
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./|\.\.%2f) [NC,OR]
RewriteCond %{QUERY_STRING} (php://|data://) [NC]
RewriteRule .* - [F,L]

# PHP open_basedir restriction example (php.ini or .user.ini)
# open_basedir = /var/www/html/wordpress:/tmp