CVE-2025-54689: Urna WordPress Theme File Inclusion Flaw

CVE-2025-54689 Overview

CVE-2025-54689 is a Local File Inclusion (LFI) vulnerability affecting the Urna WordPress theme developed by thembay. This vulnerability arises from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files from the server filesystem. Successful exploitation could lead to information disclosure, configuration file exposure, or potentially remote code execution when combined with other attack techniques.

Critical Impact

Attackers can exploit this LFI vulnerability to read sensitive server files, potentially exposing database credentials, WordPress configuration data, and other critical system information that could facilitate further attacks.

Affected Products

• Urna WordPress Theme versions through 2.5.7
• WordPress installations using vulnerable Urna theme versions

Discovery Timeline

• 2025-08-14 - CVE-2025-54689 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-54689

Vulnerability Analysis

This vulnerability is classified as CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Urna WordPress theme fails to properly validate and sanitize user-controlled input before passing it to PHP's include or require functions. This allows an attacker to manipulate file path parameters to traverse directories and include arbitrary files from the local filesystem.

The attack can be executed remotely over the network, though exploitation complexity is considered high due to the specific conditions required for successful exploitation. No authentication or user interaction is required to attempt exploitation, making it accessible to unauthenticated remote attackers.

Root Cause

The root cause of this vulnerability lies in insufficient input validation within the Urna theme's PHP code. When the theme processes user-supplied input for dynamic file inclusion operations, it fails to implement adequate sanitization or allowlist validation. This oversight allows path traversal sequences (such as ../) to be included in the filename parameter, enabling attackers to escape the intended directory and access files elsewhere on the server.

Attack Vector

The vulnerability is exploitable via network-based requests to the affected WordPress installation. An attacker can craft malicious HTTP requests containing path traversal sequences in vulnerable parameters to include arbitrary local files. Common targets include:

• WordPress configuration file (wp-config.php) containing database credentials
• System files such as /etc/passwd for user enumeration
• Log files that may contain sensitive information
• PHP session files for potential session hijacking

The attack does not require authentication, allowing any remote attacker to attempt exploitation against vulnerable installations. For detailed technical information, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2025-54689

Indicators of Compromise

• HTTP requests containing path traversal sequences (../, ..%2f, %2e%2e/) targeting Urna theme endpoints
• Access log entries showing requests for sensitive files through theme parameters
• Unexpected file access patterns in WordPress theme directories
• Error log entries indicating failed file inclusion attempts outside expected directories

Detection Strategies

• Monitor web server access logs for requests containing directory traversal patterns targeting the Urna theme
• Implement Web Application Firewall (WAF) rules to detect and block LFI attack patterns
• Deploy file integrity monitoring on sensitive configuration files
• Configure intrusion detection systems to alert on path traversal sequences in HTTP requests

Monitoring Recommendations

• Enable detailed logging for WordPress and web server access to capture potential exploitation attempts
• Set up alerting for unusual file read operations from the web server process
• Monitor for access attempts to sensitive files like wp-config.php via non-standard paths
• Review server error logs regularly for file inclusion failures that may indicate attack reconnaissance

How to Mitigate CVE-2025-54689

Immediate Actions Required

• Update the Urna WordPress theme to a patched version if available from thembay
• Implement WAF rules to block path traversal attack patterns targeting WordPress themes
• Restrict file system permissions to limit readable files by the web server process
• Consider temporarily disabling the Urna theme and switching to a secure alternative until patched

Patch Information

Users should check for theme updates from thembay through the WordPress admin dashboard or the theme vendor's website. Review the Patchstack WordPress Vulnerability Report for the latest remediation guidance and patch availability information.

Workarounds

• Deploy a Web Application Firewall with rules specifically targeting LFI attack patterns
• Implement PHP configuration hardening by restricting open_basedir to limit accessible directories
• Configure server-level access controls to prevent directory traversal outside the web root
• Use security plugins that provide virtual patching capabilities for WordPress themes

# 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