CVE-2025-69070

Executive Summary

CVE-2025-69070 is a critical PHP Local File Inclusion (LFI) vulnerability discovered in the Tornados WordPress theme developed by AncoraThemes. The flaw resides in 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 the wp-config.php file containing database credentials, or potentially achieving remote code execution if combined with file upload capabilities. The vulnerability affects all versions of the Tornados theme up to and including version 2.1. No official patch has been released, and no public proof-of-concept exploit code is currently available.

Supply Chain & Package Security

This vulnerability is specific to the WordPress ecosystem and the Tornados theme. Since it is a commercial theme distributed by AncoraThemes, the supply chain risk is limited to sites that have purchased and installed this theme. Users should verify the integrity of their theme files and monitor for any updates from the vendor. No open-source package (NPM, PyPI, Go, Ruby) is affected.

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 high confidentiality impact and low attack complexity make this a serious threat for any WordPress site using the vulnerable theme.

Deep Dive & Mechanics

The vulnerability is a classic PHP Local File Inclusion (LFI) arising from the theme's use of user-supplied input in a file inclusion function without proper sanitization. The vulnerable code likely appears in a template or plugin file that handles dynamic content loading, such as:

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

An attacker can manipulate the template parameter to traverse directories using ../ sequences, for example:

http://target.com/?template=../../../../etc/passwd

This would cause the server to include /etc/passwd instead of the intended template file. The theme does not validate or sanitize the input, allowing path traversal and inclusion of arbitrary files.

Vulnerable vs. Patched Code

Vulnerable Code (Tornados <= 2.1):

<?php
// Vulnerable: direct use of user input in include
$template = $_GET['template'];
include( get_template_directory() . '/templates/' . $template . '.php' );
?>

Patched Code (Hypothetical Fix):

<?php
// Patched: whitelist allowed templates
$allowed_templates = array('home', 'single', 'page', 'archive');
$template = $_GET['template'];
if ( in_array( $template, $allowed_templates ) ) {
    include( get_template_directory() . '/templates/' . $template . '.php' );
} else {
    // Default to home template
    include( get_template_directory() . '/templates/home.php' );
}
?>

The patched version uses a whitelist approach, ensuring only predefined template names can be included. Alternatively, the theme could use basename() and realpath() to prevent directory traversal.

Exploitation & Lab Setup

Red Team

Lab Setup:

1. Install a local WordPress instance (e.g., using Docker or XAMPP).
2. Install the Tornados theme version 2.1 (available from AncoraThemes or a vulnerable archive).
3. Activate the theme and ensure the vulnerable parameter is present (e.g., template in a page or post).

Exploitation Steps:

1. Identify the vulnerable parameter by analyzing the theme's source code or using a fuzzer.
2. Craft a request to read sensitive files:

   GET /?template=../../../../wp-config.php HTTP/1.1
   Host: target.com
   

3. The response will contain the contents of wp-config.php, revealing database credentials.
4. For further exploitation, attempt to include log files or upload a malicious file (e.g., via a plugin) and then include it to achieve RCE.

Example cURL command:

curl -v "http://target.com/?template=../../../../etc/passwd"

Blue Team

Detection:

• Monitor web server logs for suspicious template parameter values containing ../ or absolute paths.
• Look for requests to the theme's template files with unusual parameters.
• Use a Web Application Firewall (WAF) to block path traversal patterns.

Hunting:

• Search for requests like ?template=../../../../etc/passwd or ?template=../../../../wp-config.php.
• Check for repeated attempts to include /etc/passwd or other system files.

Mitigation:

• Immediately disable or remove the Tornados theme until a patch is available.
• Implement a virtual patch using a WAF to block ../ sequences in the template parameter.
• Restrict file inclusion to a whitelist of allowed templates.

Indicators of Compromise (IOCs)

• File Paths: /etc/passwd, /etc/shadow, /wp-config.php, /proc/self/environ
• URL Patterns: ?template=../../../../etc/passwd, ?template=../../../../wp-config.php
• Log Entries: HTTP GET requests with template parameter containing ../ or absolute paths.
• Network: Outbound connections from the web server to attacker-controlled hosts (if RCE is achieved).

Detection Engineering

YARA Rule

rule Detect_Tornados_LFI_Attempt {
    meta:
        description = "Detects attempts to exploit CVE-2025-69070 in Tornados theme"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-69070"
    strings:
        $lfi_pattern = /template=\.\.\/\.\.\/\.\.\/\.\.\/(etc\/passwd|wp-config\.php|proc\/self\/environ)/ nocase
        $lfi_generic = /template=\.\.\// nocase
    condition:
        any of them
}

Sigma Rule

title: Tornados Theme LFI Attempt
id: 8f4a3b2c-1d5e-6f7a-8b9c-0d1e2f3a4b5c
status: experimental
description: Detects attempts to exploit CVE-2025-69070 in Tornados WordPress theme
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains: 'template='
        cs-uri-query|re: 'template=\.\.\/'
    condition: selection
falsepositives:
    - Legitimate use of template parameter with valid paths (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-69070 Tornados Theme LFI Attempt"; flow:to_server,established; content:"GET"; http_method; content:"template="; http_uri; pcre:"/template=\.\.\//Ui"; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate Action: Disable or remove the Tornados theme from all WordPress installations until a patch is released.
2. Virtual Patching: Deploy a WAF rule to block requests containing ../ in the template parameter.
3. Code Fix: If you have access to the theme source code, implement a whitelist of allowed template names as shown in the patched code example.
4. Monitoring: Enable detailed logging for web requests and monitor for suspicious template parameter values.
5. Update: Check the AncoraThemes website or your theme purchase dashboard for any security updates. If no patch is available, consider switching to an alternative theme.

Valters IT
Securing Digital Frontiers