CVE-2025-68061

Executive Summary

CVE-2025-68061 is a critical PHP Local File Inclusion (LFI) vulnerability affecting the ThemeMove EduMall WordPress theme, versions up to and including 4.4.7. This vulnerability stems from improper control of a filename used in a PHP include/require statement, allowing an unauthenticated attacker to include arbitrary local files from the server. The CVSS score of 7.5 (High) reflects the ease of exploitation and the potential for high confidentiality impact, as an attacker can read sensitive files such as wp-config.php, /etc/passwd, or other application source code. No patch is currently available, and no public exploit code has been released, but the vulnerability is trivially exploitable via crafted HTTP requests.

Supply Chain & Package Security

This vulnerability resides in a WordPress theme distributed via ThemeForest and other marketplaces. As a WordPress ecosystem component, it is not managed through standard package managers like NPM or PyPI. However, the risk is amplified by the fact that many WordPress sites rely on automatic updates or manual theme installations, and the lack of a patch means all sites running EduMall <= 4.4.7 are exposed. Attackers can leverage this LFI to escalate to Remote Code Execution (RCE) by including log files or other writable resources, making this a critical supply chain risk for site owners.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – Exploitable remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): None (N) – No user action required.
• Scope (S): Unchanged (U) – The vulnerable component and the affected resource are the same.
• Confidentiality (C): High (H) – Full file read capability.
• Integrity (I): None (N) – No file modification.
• Availability (A): None (N) – No denial of service.

Threat Level: High. The vulnerability is easily exploitable, has a high confidentiality impact, and can be chained with other techniques (e.g., log poisoning) to achieve RCE.

Deep Dive & Mechanics

The vulnerability exists in the edumall theme's PHP code, specifically in a function that handles file inclusion without proper sanitization of user-supplied input. The theme likely uses a parameter (e.g., template, file, or page) to dynamically include template files. An attacker can manipulate this parameter to include arbitrary files from the server's filesystem.

Root Cause: The theme uses a function like include() or require() with a path that is partially or fully controlled by user input. For example:

include( $_GET['template'] . '.php' );

An attacker can bypass the .php extension using path traversal and null byte injection (in older PHP versions) or by using PHP wrappers like php://filter.

Exploitation Mechanics:

1. The attacker sends a GET request to a vulnerable endpoint, e.g., /?template=../../../../etc/passwd%00.
2. The theme includes the file, outputting its contents in the response.
3. The attacker can read sensitive files, including database credentials from wp-config.php.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code is presumed to be present in all versions <= 4.4.7. A patched version would implement strict input validation, such as:

• Whitelisting allowed template names.
• Using basename() and realpath() to resolve paths.
• Disabling PHP wrappers via allow_url_include = Off.

Vulnerable Code Example (Hypothetical):

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

Patched Code Example (Hypothetical):

$allowed_templates = array('home', 'single', 'page');
$template = $_GET['template'];
if (in_array($template, $allowed_templates)) {
    include( get_template_directory() . '/templates/' . $template . '.php' );
} else {
    // Handle error
}

Exploitation & Lab Setup

Red Team

Prerequisites:

• A WordPress site running EduMall theme <= 4.4.7.
• No authentication required.

Exploitation Steps:

1. Identify the vulnerable parameter (e.g., template, file, page). Common endpoints include /?template=, /?file=, or /?page=.
2. Test for LFI using path traversal:

   GET /?template=../../../../etc/passwd HTTP/1.1
   Host: target.com
   

3. If the response contains /etc/passwd contents, the vulnerability is confirmed.
4. Read wp-config.php to extract database credentials:

   GET /?template=../../../../wp-config.php HTTP/1.1
   

5. For RCE, use PHP wrappers or log poisoning:
   • PHP Wrapper: php://filter/convert.base64-encode/resource=../../../../wp-config.php
   • Log Poisoning: Inject PHP code into User-Agent, then include the access log.

Example cURL Command:

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

Blue Team

Detection:

• Monitor for path traversal patterns in HTTP requests (e.g., ../, %2e%2e%2f).
• Alert on requests to the theme's template inclusion endpoint with suspicious parameters.
• Use WAF rules to block php:// and file:// wrappers.

Hunting:

• Search web server logs for requests containing template=, file=, or page= with path traversal sequences.
• Look for outbound connections from the web server to unknown IPs (indicating data exfiltration).

Lab Setup:

1. Install WordPress with EduMall theme version 4.4.7.
2. Set up a local web server (e.g., XAMPP, LAMP).
3. Use Burp Suite or OWASP ZAP to intercept and modify requests.
4. Test LFI payloads and monitor server responses.

Indicators of Compromise (IOCs)

• HTTP Request Patterns:
  • GET /?template=../../../../etc/passwd
  • GET /?file=php://filter/convert.base64-encode/resource=wp-config.php
  • GET /?page=../../../../var/log/apache2/access.log
• Log Entries:
  • Repeated requests with ../ sequences.
  • User-Agent strings containing PHP code (e.g., <?php system($_GET['cmd']); ?>).
• File System Changes:
  • Unexpected files in the web root (e.g., shell.php).
  • Modified .htaccess files.
• Network Indicators:
  • Outbound connections to attacker-controlled IPs from the web server.

Detection Engineering

YARA Rule

rule CVE_2025_68061_LFI_Detection {
    meta:
        description = "Detects LFI attempts targeting EduMall theme"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-68061"
    strings:
        $path_traversal = /(\.\.\/|\.\.%2f|%2e%2e%2f)/
        $php_wrapper = /php:\/\/(filter|input|stdin)/
        $vuln_param = /[?&](template|file|page)=/
    condition:
        any of ($vuln_param) and any of ($path_traversal or $php_wrapper)
}

Sigma Rule

title: CVE-2025-68061 EduMall LFI Attempt
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects LFI attempts against EduMall theme
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-uri-query|contains:
            - 'template='
            - 'file='
            - 'page='
        cs-uri-query|re: '(\.\.\/|\.\.%2f|%2e%2e%2f|php:\/\/)'
    condition: selection
falsepositives:
    - Legitimate use of template parameters (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-68061 EduMall LFI Attempt"; flow:to_server,established; content:"GET"; http_method; content:"template="; http_uri; pcre:"/(\.\.\/|\.\.%2f|%2e%2e%2f|php:\/\/)/Ri"; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the EduMall theme and switch to a secure alternative until a patch is released.
2. Implement a Web Application Firewall (WAF) rule to block path traversal and PHP wrapper requests.
3. Set allow_url_include = Off in php.ini to prevent PHP wrapper exploitation.
4. Restrict file permissions on sensitive files (e.g., wp-config.php should be readable only by the web server user).

Long-Term Fix:

• Monitor the ThemeMove vendor for a patched version (>= 4.4.8).
• Apply the patch as soon as it becomes available.
• Conduct a security audit of all WordPress themes and plugins in use.

Workaround (if patching is not possible):

• Modify the theme's source code to whitelist allowed template names and sanitize input using basename() and realpath().

Valters IT
Securing Digital Frontiers