CVE-2026-27992: Meals & Wheels Path Traversal Vulnerability

CVE-2026-27992 Overview

CVE-2026-27992 is a Local File Inclusion (LFI) vulnerability affecting the ThemeREX Meals & Wheels WordPress theme. The vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files from the server's filesystem. This can lead to sensitive information disclosure, configuration file exposure, and potentially remote code execution when combined with other attack techniques.

Critical Impact

Attackers can exploit this LFI vulnerability to read sensitive server files, access WordPress configuration credentials, and potentially achieve remote code execution through log poisoning or other file inclusion techniques.

Affected Products

• ThemeREX Meals & Wheels WordPress Theme versions through 1.1.12
• WordPress installations using the vulnerable Meals & Wheels theme
• Web servers hosting affected WordPress instances

Discovery Timeline

• 2026-03-05 - CVE CVE-2026-27992 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-27992

Vulnerability Analysis

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Meals & Wheels WordPress theme fails to properly sanitize user-supplied input before using it in PHP include or require statements. This allows an attacker to manipulate file path parameters to include arbitrary files from the local filesystem.

Local File Inclusion vulnerabilities in WordPress themes are particularly dangerous because they can expose the wp-config.php file, which contains database credentials, authentication keys, and other sensitive configuration data. Additionally, if an attacker can write content to a file on the server (such as through log files or uploaded images with embedded PHP code), they may be able to escalate the LFI to achieve remote code execution.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and sanitization within the theme's file handling functions. When the theme dynamically includes PHP files based on user-controlled parameters, it fails to implement proper path traversal protection or whitelist validation. This allows malicious actors to use directory traversal sequences (such as ../) to navigate outside the intended directory and include sensitive system or application files.

Attack Vector

The attack vector involves manipulating HTTP request parameters that control file inclusion within the theme. An attacker can craft malicious requests containing path traversal sequences to include files outside the web application's intended scope. The vulnerability can be exploited remotely without authentication, making it accessible to any attacker who can send HTTP requests to the vulnerable WordPress installation.

Typical exploitation involves targeting sensitive files such as /etc/passwd for user enumeration, wp-config.php for database credentials, or application log files that may contain user-injected content for code execution purposes.

Detection Methods for CVE-2026-27992

Indicators of Compromise

• HTTP request logs containing path traversal patterns such as ../, ..%2f, or encoded variants targeting theme endpoints
• Unexpected access attempts to sensitive files like wp-config.php, /etc/passwd, or application log files
• Error logs showing PHP warnings about failed file inclusions with unusual file paths
• Web application firewall (WAF) alerts for LFI or directory traversal attempts

Detection Strategies

• Implement web application firewall rules to detect and block path traversal sequences in request parameters
• Monitor access logs for requests containing ../ patterns or encoded directory traversal characters
• Deploy file integrity monitoring on sensitive configuration files to detect unauthorized access
• Utilize intrusion detection systems with signatures for common LFI attack patterns

Monitoring Recommendations

• Enable verbose logging for the WordPress installation and review logs regularly for suspicious file access patterns
• Configure alerts for any 4xx/5xx errors related to file inclusion attempts
• Monitor outbound network traffic for data exfiltration following potential file access
• Implement real-time log analysis to detect LFI exploitation attempts

How to Mitigate CVE-2026-27992

Immediate Actions Required

• Update the Meals & Wheels theme to a patched version if available from ThemeREX
• If no patch is available, consider temporarily disabling or replacing the vulnerable theme
• Implement web application firewall rules to block path traversal attempts
• Review server access logs for signs of exploitation and investigate any suspicious activity

Patch Information

ThemeREX Meals & Wheels theme users should check for updated versions that address this vulnerability. For detailed vulnerability information and remediation guidance, refer to the Patchstack Vulnerability Report. If a patched version is not yet available, implement the workarounds described below until an official fix is released.

Workarounds

• Deploy a web application firewall (WAF) with rules to block LFI and path traversal attempts
• Implement PHP open_basedir restrictions to limit file access to the web root directory
• Disable the vulnerable theme and switch to an alternative until a patch is available
• Restrict file permissions on sensitive files like wp-config.php to prevent unauthorized reading

# Configuration example - Restrict PHP open_basedir in Apache
# Add to .htaccess or Apache configuration
php_admin_value open_basedir /var/www/html/:/tmp/

# Restrict wp-config.php permissions
chmod 400 /var/www/html/wp-config.php
chown www-data:www-data /var/www/html/wp-config.php