CVE-2025-32921: Arrival Theme PHP File Inclusion Flaw

CVE-2025-32921 Overview

CVE-2025-32921 is a PHP Local File Inclusion (LFI) vulnerability affecting the Arrival WordPress theme developed by wpoperations. This vulnerability arises from improper control of filename for include/require statements in PHP, classified under CWE-98. An attacker exploiting this vulnerability could potentially include and execute arbitrary local files on the server, leading to information disclosure, code execution, or complete system compromise.

Critical Impact

Attackers can leverage this Local File Inclusion vulnerability to read sensitive files, execute arbitrary PHP code, or escalate to Remote Code Execution through log poisoning or other LFI-to-RCE techniques.

Affected Products

• wpoperations Arrival WordPress Theme version 1.4.5 and earlier
• All WordPress installations running vulnerable versions of the Arrival theme

Discovery Timeline

• 2025-04-24 - CVE-2025-32921 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-32921

Vulnerability Analysis

This vulnerability represents a classic PHP Local File Inclusion weakness where user-controllable input is improperly validated before being passed to PHP's include(), require(), include_once(), or require_once() functions. The Arrival WordPress theme fails to properly sanitize file path parameters, allowing attackers to manipulate the included filename and traverse directory structures to access files outside the intended directory.

Local File Inclusion vulnerabilities in WordPress themes are particularly dangerous because WordPress installations often contain sensitive configuration files, including wp-config.php which stores database credentials and authentication keys. Additionally, PHP-based LFI vulnerabilities can potentially be escalated to Remote Code Execution through techniques such as log file poisoning, PHP wrapper abuse, or exploitation of uploaded files.

Root Cause

The root cause stems from insufficient input validation and sanitization in the Arrival theme's file inclusion mechanisms. The theme accepts user-supplied input that influences file paths without adequately restricting the allowed values or preventing directory traversal sequences such as ../. This violates secure coding practices that mandate strict whitelisting of allowed files or proper canonicalization and validation of file paths before inclusion.

Attack Vector

The attack vector for this LFI vulnerability typically involves manipulating GET or POST parameters that control which template or file component gets loaded by the theme. An attacker can craft malicious requests containing directory traversal sequences to escape the intended directory and include arbitrary local files.

Common exploitation techniques include:

• Using ../ sequences to traverse to sensitive files like /etc/passwd or wp-config.php
• Leveraging PHP wrappers such as php://filter to read file contents as base64
• Combining with log poisoning to inject and execute malicious PHP code
• Exploiting uploaded files or session files for code execution

For detailed technical analysis, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2025-32921

Indicators of Compromise

• Unusual HTTP requests containing directory traversal patterns (../, ..%2f, ..%252f) in theme-related parameters
• Web server logs showing attempts to access sensitive files like /etc/passwd, wp-config.php, or log files
• Requests containing PHP wrapper strings such as php://filter, php://input, or expect://
• Unexpected file access patterns in WordPress theme directories

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block directory traversal attempts in HTTP requests
• Monitor web server access logs for suspicious file inclusion patterns and traversal sequences
• Deploy intrusion detection systems with signatures for LFI attack patterns
• Enable PHP open_basedir restrictions and monitor for violation attempts
• Review WordPress access logs for unusual theme file access patterns

Monitoring Recommendations

• Configure real-time alerting for directory traversal attack patterns in web application logs
• Monitor file system access for unusual reads of sensitive configuration files
• Implement centralized logging for all WordPress installations to correlate potential attack attempts
• Set up honeypot files in common traversal target locations to detect exploitation attempts

How to Mitigate CVE-2025-32921

Immediate Actions Required

• Update the Arrival WordPress theme to a patched version if available from wpoperations
• If no patch is available, consider temporarily deactivating and removing the Arrival theme
• Implement WAF rules to block directory traversal patterns targeting your WordPress installation
• Review web server logs for signs of prior exploitation attempts
• Audit file permissions to ensure sensitive files are not world-readable

Patch Information

Organizations using the Arrival WordPress theme should check for updates through the WordPress theme repository or directly with wpoperations. The vulnerability affects Arrival theme versions through 1.4.5. Monitor the Patchstack advisory for patch availability and version recommendations.

Workarounds

• Restrict access to the WordPress admin and theme directories using .htaccess rules or web server configuration
• Implement open_basedir PHP restrictions to limit file access scope
• Deploy a WAF with LFI protection rules to filter malicious requests
• Use file integrity monitoring to detect unauthorized file access or modifications

# Example Apache .htaccess rule to block common LFI patterns
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./|\.\.\\) [NC,OR]
    RewriteCond %{QUERY_STRING} (php://|expect://|data://) [NC]
    RewriteRule .* - [F,L]
</IfModule>

# PHP open_basedir restriction in php.ini or .htaccess
php_value open_basedir "/var/www/html:/tmp"