CVE-2026-28022: ThemeREX Foodie LFI Vulnerability

CVE-2026-28022 Overview

CVE-2026-28022 is a Local File Inclusion (LFI) vulnerability affecting the ThemeREX Foodie WordPress theme. The vulnerability stems from improper control of filename for include/require statements in PHP, allowing attackers to include local files from the server. This flaw, classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program), enables malicious actors to read sensitive files, potentially leading to information disclosure or further exploitation of the affected WordPress installation.

Critical Impact

Attackers can exploit this Local File Inclusion vulnerability to read sensitive configuration files, access credentials stored on the server, and potentially escalate to remote code execution through log file poisoning or other chained attack techniques.

Affected Products

• ThemeREX Foodie WordPress Theme version 1.14 and earlier
• WordPress installations using the Foodie theme
• All versions from initial release through version 1.14

Discovery Timeline

• 2026-03-05 - CVE CVE-2026-28022 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-28022

Vulnerability Analysis

This vulnerability exists in the ThemeREX Foodie WordPress theme due to inadequate validation and sanitization of user-controlled input that is subsequently used in PHP include or require statements. The flaw allows an attacker to manipulate file path parameters to include arbitrary local files from the server's filesystem.

Local File Inclusion vulnerabilities in WordPress themes are particularly dangerous because they can expose sensitive files such as wp-config.php, which contains database credentials and authentication keys. Additionally, if the attacker can influence the contents of any file on the system (such as log files or uploaded files), this vulnerability could be leveraged to achieve remote code execution.

Root Cause

The root cause of this vulnerability is the improper control of filename parameters used in PHP's include or require functions. The Foodie theme fails to properly validate, sanitize, or restrict user-supplied input before incorporating it into file path operations. This allows path traversal sequences and arbitrary file paths to be processed by the PHP interpreter, resulting in the inclusion of unintended files.

Attack Vector

The attack vector involves manipulating HTTP request parameters that control which files are included by the theme's PHP code. An attacker can craft malicious requests containing path traversal sequences (such as ../) or absolute file paths to include sensitive system files or configuration files. The vulnerability is exploitable remotely without requiring authentication, making it accessible to unauthenticated attackers who can send HTTP requests to the vulnerable WordPress installation.

The exploitation typically involves identifying the vulnerable parameter and then using directory traversal techniques to navigate the filesystem and include target files such as /etc/passwd on Linux systems or WordPress configuration files like wp-config.php.

Detection Methods for CVE-2026-28022

Indicators of Compromise

• Unusual HTTP requests containing path traversal sequences (../, ..%2f, %2e%2e/) targeting theme files
• Web server access logs showing requests with file path parameters pointing to sensitive system files
• Unexpected file access patterns in WordPress theme directories
• Error logs indicating failed file inclusion attempts or PHP warnings related to include/require operations

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block path traversal patterns in HTTP requests
• Monitor web server logs for requests containing suspicious file path sequences targeting the Foodie theme endpoints
• Deploy file integrity monitoring to detect unauthorized access to sensitive configuration files
• Configure intrusion detection systems to alert on LFI attack signatures

Monitoring Recommendations

• Enable detailed logging for PHP file operations and include statements
• Set up alerting for access attempts to sensitive files such as wp-config.php, /etc/passwd, or log files
• Monitor for unusual patterns in theme-related HTTP requests, particularly those with encoded path traversal characters

How to Mitigate CVE-2026-28022

Immediate Actions Required

• Update the ThemeREX Foodie theme to the latest patched version immediately
• If no patch is available, consider temporarily disabling or removing the Foodie theme until a fix is released
• Implement WAF rules to block path traversal attacks targeting WordPress themes
• Review server access logs for evidence of exploitation attempts

Patch Information

Affected users should consult the Patchstack WordPress Vulnerability Database for the latest information on available patches and remediation guidance. Contact ThemeREX support for information on updated versions that address this vulnerability.

Workarounds

• Deploy a Web Application Firewall with rules specifically designed to block LFI and path traversal attacks
• Implement server-level restrictions using open_basedir PHP configuration to limit file system access
• Use file permission hardening to restrict read access to sensitive configuration files
• Consider using WordPress security plugins that provide virtual patching capabilities for known theme vulnerabilities

# PHP configuration hardening example
# Add to php.ini or .htaccess to restrict file access
php_value open_basedir "/var/www/html:/tmp"

# Apache mod_security rule example for blocking path traversal
SecRule REQUEST_URI "\.\./" "id:1,phase:1,deny,status:403,msg:'Path Traversal Attack Blocked'"