CVE-2026-28051: Yacht Rental Path Traversal Vulnerability

CVE-2026-28051 Overview

CVE-2026-28051 is a PHP Local File Inclusion (LFI) vulnerability affecting the ThemeREX Yacht Rental WordPress theme. The vulnerability stems from improper control of filename for include/require statements in PHP, allowing attackers to include arbitrary local files on the server. This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program).

Critical Impact

Successful exploitation could allow unauthenticated attackers to read sensitive files on the server, potentially leading to exposure of configuration files, credentials, and other sensitive data. In worst-case scenarios, this could be chained with other vulnerabilities to achieve remote code execution.

Affected Products

• ThemeREX Yacht Rental WordPress Theme versions up to and including 2.6
• WordPress installations running vulnerable versions of the Yacht Rental theme

Discovery Timeline

• 2026-03-05 - CVE CVE-2026-28051 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-28051

Vulnerability Analysis

This Local File Inclusion vulnerability exists in the ThemeREX Yacht Rental WordPress theme due to insufficient validation of user-controlled input that is passed to PHP include or require statements. The vulnerability allows attackers to manipulate file path parameters to include local files that exist on the target server.

The attack can be executed remotely over the network, though exploitation requires specific conditions to be met, which contributes to the complexity of successful attacks. Once exploited, the vulnerability can compromise the confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of this vulnerability is the improper sanitization of user-supplied input before it is used in PHP file inclusion operations. The theme fails to adequately validate or restrict the file paths that can be included, allowing attackers to traverse directories and include unintended files from the server's filesystem.

Attack Vector

The attack vector for CVE-2026-28051 is network-based, meaning remote attackers can exploit this vulnerability without requiring authentication to the WordPress site. The attacker manipulates HTTP parameters to inject path traversal sequences (such as ../) that allow them to escape the intended directory and include arbitrary local files.

Typical exploitation targets include:

• WordPress configuration files (wp-config.php) containing database credentials
• System files like /etc/passwd on Linux systems
• Log files that may contain sensitive information
• Other PHP files that could be leveraged for further attacks

The vulnerability mechanism involves crafting malicious requests that manipulate the file inclusion logic within the theme. Attackers typically use directory traversal techniques to navigate outside the web root and access sensitive system files. For detailed technical information, refer to the Patchstack WordPress Theme Advisory.

Detection Methods for CVE-2026-28051

Indicators of Compromise

• Unusual HTTP requests containing path traversal sequences such as ../, ..%2f, or ..%252f targeting the Yacht Rental theme files
• Web server logs showing attempts to access sensitive files like wp-config.php, /etc/passwd, or /proc/self/environ
• Error messages in PHP logs indicating failed file inclusion attempts
• Unexpected file access patterns or read operations on system-sensitive files

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in HTTP requests
• Monitor web server access logs for suspicious URL patterns targeting the /wp-content/themes/yacht-rental/ directory
• Deploy file integrity monitoring to detect unauthorized access to sensitive configuration files
• Configure PHP logging to capture include/require statement failures

Monitoring Recommendations

• Enable detailed logging for all HTTP requests to WordPress installations running the Yacht Rental theme
• Set up alerts for any requests containing encoded or double-encoded directory traversal sequences
• Monitor for unusual outbound connections that could indicate post-exploitation activity
• Review PHP error logs regularly for inclusion-related warnings and errors

How to Mitigate CVE-2026-28051

Immediate Actions Required

• Update the ThemeREX Yacht Rental theme to a patched version when available
• If no patch is available, consider temporarily deactivating the theme and switching to an alternative
• Implement WAF rules to block path traversal attempts targeting WordPress themes
• Restrict file system permissions to limit the impact of successful exploitation
• Review server logs for any signs of prior exploitation attempts

Patch Information

Review the Patchstack WordPress Theme Advisory for the latest patch information and vendor updates. Contact ThemeREX directly for information about patched versions of the Yacht Rental theme.

Workarounds

• Implement strict input validation at the web server level using ModSecurity or similar WAF solutions
• Use PHP open_basedir directive to restrict file access to the WordPress installation directory
• Deploy additional access controls using .htaccess rules to block suspicious request patterns
• Consider implementing a virtual patching solution until an official fix is available

# Example .htaccess rules to block common LFI patterns
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./|\.\.\\) [NC,OR]
    RewriteCond %{QUERY_STRING} (boot\.ini|etc/passwd|self/environ) [NC]
    RewriteRule .* - [F,L]
</IfModule>