CVE-2025-49256: Sapa WordPress Plugin LFI Vulnerability

CVE-2025-49256 Overview

CVE-2025-49256 is a Local File Inclusion (LFI) vulnerability affecting the Sapa WordPress theme developed by thembay. 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. This can lead to sensitive information disclosure, potential code execution if combined with other techniques, and complete compromise of the affected WordPress installation.

Critical Impact

Attackers can leverage this Local File Inclusion vulnerability to read sensitive configuration files, access database credentials, or potentially achieve remote code execution through log poisoning or other advanced LFI exploitation techniques.

Affected Products

• Sapa WordPress Theme versions up to and including 1.1.14
• WordPress installations running the vulnerable Sapa theme
• Web servers hosting WordPress sites with the Sapa theme installed

Discovery Timeline

• 2025-06-17 - CVE-2025-49256 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-49256

Vulnerability Analysis

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Sapa WordPress theme fails to properly validate or sanitize user-supplied input before passing it to PHP's file inclusion functions such as include(), include_once(), require(), or require_once().

When an attacker can control the filename parameter passed to these functions, they can traverse the directory structure and include arbitrary files from the local filesystem. This is particularly dangerous in WordPress environments where configuration files like wp-config.php contain database credentials and authentication keys.

Root Cause

The root cause of this vulnerability lies in the theme's failure to implement proper input validation and sanitization on user-controlled parameters that are subsequently used in PHP file inclusion statements. The theme does not restrict the file path to a whitelist of allowed files or directories, nor does it properly filter path traversal sequences like ../ that would allow an attacker to escape the intended directory context.

Attack Vector

The attack vector involves manipulating request parameters to inject path traversal sequences and target sensitive files on the server. An attacker can craft malicious HTTP requests containing payloads designed to traverse directories and include files outside the intended scope.

Common exploitation targets include:

• /etc/passwd for user enumeration on Linux systems
• wp-config.php for WordPress database credentials
• Log files for potential log poisoning attacks
• Session files for session hijacking

The vulnerability can be exploited remotely without authentication, making it accessible to any attacker who can reach the vulnerable WordPress installation.

Detection Methods for CVE-2025-49256

Indicators of Compromise

• Unusual HTTP requests containing path traversal patterns such as ../, ..%2f, or ..%252f targeting theme files
• Access logs showing requests to the Sapa theme endpoints with suspicious file path parameters
• Unexpected access to sensitive files like /etc/passwd or wp-config.php in web server logs
• Error logs containing PHP include/require warnings referencing unexpected file paths

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in request parameters
• Configure log monitoring to alert on requests containing directory traversal sequences targeting the Sapa theme
• Deploy file integrity monitoring on critical configuration files to detect unauthorized access attempts
• Use security plugins that monitor for suspicious file access patterns within WordPress

Monitoring Recommendations

• Enable verbose logging for PHP applications to capture file inclusion attempts and their parameters
• Monitor WordPress security plugins for LFI detection alerts related to the Sapa theme
• Implement real-time alerting for path traversal patterns in web application logs
• Review access logs periodically for requests targeting theme files with unusual parameters

How to Mitigate CVE-2025-49256

Immediate Actions Required

• Update the Sapa WordPress theme to the latest available version if a patch has been released by the vendor
• If no patch is available, consider temporarily disabling or removing the Sapa theme and switching to an alternative
• Implement WAF rules to block requests containing path traversal patterns targeting the theme
• Review server logs to identify any potential exploitation attempts
• Audit WordPress installations to identify all instances using the vulnerable Sapa theme

Patch Information

For detailed patch and vulnerability information, refer to the Patchstack WordPress Vulnerability Advisory. Users should update to a patched version of the Sapa theme when available from the vendor. If no update is available, implementing the workarounds below is strongly recommended.

Workarounds

• Deploy Web Application Firewall rules to block path traversal patterns in HTTP requests targeting WordPress themes
• Restrict access to sensitive server files using proper file permissions and web server configuration
• Implement PHP open_basedir restrictions to limit the directories that PHP can access
• Consider using security plugins like Wordfence or Sucuri that provide virtual patching capabilities
• Monitor and restrict the allowed file types and paths that can be included by the theme

# Apache .htaccess configuration to block path traversal attempts
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./) [NC,OR]
RewriteCond %{QUERY_STRING} (\.\.\\) [NC,OR]
RewriteCond %{QUERY_STRING} (%2e%2e/) [NC,OR]
RewriteCond %{QUERY_STRING} (%2e%2e\\) [NC]
RewriteRule ^.*$ - [F,L]