CVE-2025-69406

Executive Summary

CVE-2025-69406 is a critical PHP Local File Inclusion (LFI) vulnerability discovered in the ThemeREX FreightCo WordPress theme, affecting all versions up to and including 1.1.7. The vulnerability stems from improper control of filenames used in PHP include/require statements, allowing an unauthenticated attacker to include arbitrary local files from the server. This can lead to sensitive information disclosure, such as reading /etc/passwd, configuration files, or WordPress wp-config.php. The CVSS score of 8.1 (High) reflects the ease of exploitation and potential for severe data exposure. No public proof-of-concept or patch is currently available, making this a high-priority zero-day for WordPress administrators.

Supply Chain & Package Security

This vulnerability affects a WordPress theme distributed via ThemeREX and potentially through third-party marketplaces. Since WordPress themes are often bundled with plugins and child themes, the supply chain risk extends to any site using the FreightCo theme. Administrators should verify the integrity of their theme files and monitor for updates from ThemeREX.

CVSS Breakdown & Threat Level

• CVSS Score: 8.1 (High)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: High
• Integrity Impact: None
• Availability Impact: None

The vulnerability is remotely exploitable without authentication, making it a significant threat to any WordPress site using the FreightCo theme. The high confidentiality impact means an attacker can read sensitive files, potentially leading to credential theft or further compromise.

Deep Dive & Mechanics

The vulnerability exists in the FreightCo theme's PHP code, likely within a custom template or shortcode handler that uses include() or require() with user-supplied input. The improper control of the filename allows path traversal sequences (e.g., ../../) to include arbitrary files from the server's filesystem.

Root Cause: The theme fails to sanitize or validate the $_GET['file'] or similar parameter before passing it to a PHP include function. This allows an attacker to specify a path like ../../../../etc/passwd to read sensitive files.

Exploitation Flow:

1. Attacker identifies a vulnerable endpoint (e.g., /?template=... or a shortcode).
2. Attacker crafts a request with a path traversal payload.
3. The server includes the specified file, outputting its contents in the HTTP response.
4. Attacker reads sensitive data, such as database credentials from wp-config.php.

Vulnerable vs. Patched Code

Vulnerable Code (Example):

<?php
// freightco/includes/template-loader.php
$template = $_GET['template'];
include( get_template_directory() . '/templates/' . $template . '.php' );
?>

Patched Code (Hypothetical):

<?php
// freightco/includes/template-loader.php
$allowed_templates = array('home', 'about', 'contact');
$template = $_GET['template'];
if (in_array($template, $allowed_templates)) {
    include( get_template_directory() . '/templates/' . $template . '.php' );
} else {
    // Handle error
}
?>

The patched version uses a whitelist of allowed templates, preventing arbitrary file inclusion. Without an official patch, administrators must implement similar input validation.

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

1. Install WordPress with the FreightCo theme (version 1.1.7) on a local server (e.g., XAMPP or Docker).
2. Ensure the vulnerable endpoint is accessible (e.g., via a shortcode or page template).

Exploitation Steps:

1. Identify the vulnerable parameter (e.g., template).
2. Send a crafted request:

   curl "http://target/wp-content/themes/freightco/includes/template-loader.php?template=../../../../etc/passwd"
   

3. If successful, the response will contain the contents of /etc/passwd.

Advanced Payloads:

• Read WordPress configuration:

  curl "http://target/wp-content/themes/freightco/includes/template-loader.php?template=../../../../wp-config"
  

• Use PHP wrappers for code execution (if allow_url_include is enabled):

  curl "http://target/wp-content/themes/freightco/includes/template-loader.php?template=php://filter/convert.base64-encode/resource=../../../../wp-config"
  

Blue Team (Defensive)

Detection Steps:

1. Monitor web server logs for path traversal patterns (e.g., ../, %2e%2e%2f).
2. Look for requests to theme files with suspicious parameters.
3. Check for unexpected file reads in access logs.

Mitigation:

1. Disable the vulnerable theme until a patch is available.
2. Implement a Web Application Firewall (WAF) rule to block path traversal attempts.
3. Restrict file permissions on sensitive files (e.g., wp-config.php should be read-only for the web server user).

Indicators of Compromise (IOCs)

• File Paths: /etc/passwd, /wp-config.php, /proc/self/environ
• URL Patterns: ?template=../../, ?file=php://filter/
• Log Entries: Requests containing ../ or %2e%2e%2f in the query string.
• Network Traffic: Outbound connections from the web server to unknown IPs (if code execution is achieved).

Detection Engineering

YARA Rule

rule CVE_2025_69406_LFI_Detection {
    meta:
        description = "Detects path traversal attempts targeting FreightCo theme"
        author = "Valters IT"
        date = "2025-04-01"
        reference = "CVE-2025-69406"
    strings:
        $path_traversal = /\.\.\/|\.\.\\|%2e%2e%2f|%2e%2e%5c/
        $theme_file = /freightco\/includes\/template-loader\.php/
    condition:
        $theme_file and $path_traversal
}

Sigma Rule

title: CVE-2025-69406 FreightCo LFI Attempt
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects path traversal attempts in HTTP requests to FreightCo theme
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-uri-query|contains:
            - '../'
            - '..\\'
            - '%2e%2e%2f'
            - '%2e%2e%5c'
        cs-uri-stem|contains: '/freightco/includes/template-loader.php'
    condition: selection
falsepositives:
    - Legitimate use of relative paths in custom code
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-69406 FreightCo LFI Attempt"; flow:to_server,established; content:"/freightco/includes/template-loader.php"; http_uri; content:"../"; http_uri; distance:0; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate Action: Disable the FreightCo theme and switch to a default WordPress theme (e.g., Twenty Twenty-Four) until a patch is released.
2. Short-term Mitigation: Implement a WAF rule to block path traversal patterns in query strings.
3. Long-term Fix: Apply input validation and whitelisting for all file inclusion parameters. Use basename() and realpath() to sanitize paths.
4. Monitoring: Enable detailed logging for web server and monitor for suspicious requests.
5. Vendor Contact: Reach out to ThemeREX for an official patch and subscribe to their security advisories.

Valters IT
Securing Digital Frontiers