CVE-2025-49883: Greenmart PHP File Inclusion Vulnerability

CVE-2025-49883 Overview

CVE-2025-49883 is a Local File Inclusion (LFI) vulnerability affecting the Greenmart WordPress theme developed by thembay. This vulnerability stems from improper control of filename for include/require statements in PHP, classified under CWE-98 (PHP Remote File Inclusion). The flaw allows attackers to include local files from the server, potentially leading to sensitive information disclosure, configuration file exposure, or in severe cases, remote code execution through log poisoning or other chained techniques.

Critical Impact

Attackers can leverage this Local File Inclusion vulnerability to read sensitive server files, access configuration data, and potentially achieve code execution through file inclusion chains.

Affected Products

• Greenmart WordPress Theme versions through 4.2.3
• WordPress installations using vulnerable Greenmart theme versions
• Websites with thembay Greenmart theme deployed

Discovery Timeline

• 2025-06-27 - CVE-2025-49883 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-49883

Vulnerability Analysis

This vulnerability exists in the Greenmart WordPress theme due to improper sanitization of user-controlled input that is subsequently used in PHP include or require statements. When a PHP application uses unsanitized user input to construct file paths for inclusion operations, attackers can manipulate these paths to include arbitrary local files from the server's filesystem.

Local File Inclusion vulnerabilities in WordPress themes are particularly dangerous because WordPress installations often contain sensitive configuration files such as wp-config.php, which stores database credentials, authentication keys, and other critical security parameters. Additionally, attackers may leverage LFI to include server log files that have been poisoned with malicious PHP code, effectively converting the LFI into a remote code execution vulnerability.

Root Cause

The root cause of CVE-2025-49883 is the improper validation and sanitization of user-supplied input before it is used in PHP file inclusion operations. The Greenmart theme fails to adequately restrict which files can be included, allowing attackers to traverse directories and include files outside the intended scope. This represents a violation of secure coding practices where user input should never be directly used in filesystem operations without strict validation, path canonicalization, and allowlist-based filtering.

Attack Vector

The attack vector for this vulnerability involves an attacker providing malicious input containing directory traversal sequences (such as ../) or absolute file paths to a vulnerable parameter in the Greenmart theme. When the application processes this input without proper sanitization, it includes the attacker-specified file, exposing its contents or executing any PHP code contained within.

Typical exploitation scenarios include:

1. Reading sensitive configuration files by traversing to wp-config.php
2. Accessing system files like /etc/passwd on Linux servers
3. Including PHP session files to hijack user sessions
4. Poisoning log files with PHP code and then including them for code execution

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

Detection Methods for CVE-2025-49883

Indicators of Compromise

• Unusual access patterns to sensitive files such as wp-config.php or system configuration files
• Web server logs containing directory traversal sequences (../, ..%2f, %2e%2e/) in request parameters
• Unexpected file access attempts targeting paths outside the WordPress installation directory
• Access attempts to common target files like /etc/passwd, /proc/self/environ, or log files

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block directory traversal patterns in HTTP requests
• Monitor web server access logs for suspicious file inclusion attempts using pattern matching for LFI indicators
• Deploy file integrity monitoring on critical WordPress configuration files to detect unauthorized access
• Enable PHP error logging and monitor for include/require errors indicating exploitation attempts

Monitoring Recommendations

• Configure SIEM alerts for requests containing path traversal sequences targeting WordPress theme directories
• Implement real-time monitoring of web server logs for anomalous file access patterns
• Set up alerts for access attempts to sensitive WordPress files from web application contexts
• Monitor for unusual PHP process behavior that may indicate successful code execution via log poisoning

How to Mitigate CVE-2025-49883

Immediate Actions Required

• Update the Greenmart WordPress theme to a patched version beyond 4.2.3 when available from thembay
• Implement Web Application Firewall rules to block directory traversal and LFI attack patterns
• Review server access logs for evidence of exploitation attempts and investigate any suspicious activity
• Consider temporarily disabling or replacing the vulnerable theme if no patch is available

Patch Information

Organizations using the Greenmart WordPress theme should monitor the thembay vendor channels and the Patchstack Vulnerability Report for updates regarding security patches. Update to a version newer than 4.2.3 once a security fix is released by the vendor.

Workarounds

• Deploy a Web Application Firewall with rules specifically designed to detect and block LFI attacks
• Implement server-level restrictions using open_basedir PHP configuration to limit file access scope
• Use WordPress security plugins that provide virtual patching capabilities for known vulnerabilities
• Apply the principle of least privilege to web server file permissions, restricting access to sensitive files

# PHP configuration hardening example
# Add to php.ini or .htaccess to restrict file access scope
php_admin_value open_basedir "/var/www/html:/tmp"
php_admin_flag allow_url_include off
php_admin_flag allow_url_fopen off