CVE-2025-62061

Executive Summary

CVE-2025-62061 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Product Catalog Simple WordPress plugin by impleCode, affecting versions up to and including 1.8.4. This vulnerability allows an attacker to perform unauthorized actions on behalf of an authenticated administrator, such as modifying plugin settings or deleting product data, without the victim's consent. The attack requires social engineering to trick a logged-in admin into clicking a malicious link or visiting a crafted page. The CVSS v3.1 base score is 4.3 (Medium), with a low EPSS score of 0.0%, indicating low exploitation likelihood in the wild. No public proof-of-concept (PoC) or exploit code is currently available, and no official patch has been released by the vendor.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users are advised to monitor the plugin's update channel for a patched version. Since no patch is available, temporary mitigations such as disabling the plugin or implementing a Web Application Firewall (WAF) rule are recommended.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – The attack is carried out over the network.
• Attack Complexity (AC): Low (L) – No special conditions are required.
• Privileges Required (PR): None (N) – The attacker does not need prior authentication.
• User Interaction (UI): Required (R) – The victim must perform an action (e.g., click a link).
• Scope (S): Unchanged (U) – The impact is confined to the vulnerable component.
• Confidentiality Impact (C): None (N) – No data disclosure.
• Integrity Impact (I): Low (L) – Unauthorized modification of plugin settings or data is possible.
• Availability Impact (A): None (N) – No denial of service.

Threat Level: Medium. The vulnerability requires user interaction and has limited impact, but it can be chained with other attacks (e.g., stored XSS) to escalate privileges.

Deep Dive & Mechanics

The CSRF vulnerability in Product Catalog Simple arises from the lack of nonce validation or CSRF tokens in critical administrative actions. The plugin registers several AJAX handlers and admin POST endpoints that modify plugin options, product categories, or product entries. Without a CSRF token check, an attacker can craft a malicious HTML page that, when visited by an authenticated admin, submits a forged request to these endpoints.

Attack Flow:

1. The attacker identifies the vulnerable endpoints (e.g., /wp-admin/admin-ajax.php?action=implecode_save_settings).
2. The attacker crafts a malicious HTML page containing a form or JavaScript that auto-submits a POST request to the endpoint with attacker-controlled parameters.
3. The attacker lures the victim (an authenticated WordPress admin) to visit the malicious page.
4. The victim's browser sends the forged request, including the victim's session cookies, to the WordPress site.
5. The plugin processes the request without verifying the origin, leading to unauthorized changes.

Affected Components:

• implecode_save_settings AJAX action
• implecode_delete_product AJAX action
• Admin POST handlers for product catalog management

Vulnerable vs. Patched Code

Since no official patch is available, the following is a hypothetical comparison based on common CSRF mitigation patterns.

Vulnerable Code (Example):

// vulnerable.php
add_action('wp_ajax_implecode_save_settings', 'save_settings_handler');
function save_settings_handler() {
    // No nonce check
    update_option('implecode_settings', $_POST['settings']);
    wp_die();
}

Patched Code (Hypothetical):

// patched.php
add_action('wp_ajax_implecode_save_settings', 'save_settings_handler');
function save_settings_handler() {
    // Verify nonce
    if (!isset($_POST['_wpnonce']) || !wp_verify_nonce($_POST['_wpnonce'], 'implecode_save_settings')) {
        wp_die('CSRF validation failed.');
    }
    update_option('implecode_settings', $_POST['settings']);
    wp_die();
}

Exploitation & Lab Setup

Red Team (Attack Simulation)

Prerequisites:

• A WordPress site with Product Catalog Simple <= 1.8.4 installed and activated.
• An authenticated admin user session.

Exploitation Steps:

1. Identify the target WordPress admin URL (e.g., https://target.com/wp-admin/).
2. Craft a malicious HTML page that forges a request to change plugin settings. Example:

<html>
<body>
<form action="https://target.com/wp-admin/admin-ajax.php" method="POST" id="csrf_form">
    <input type="hidden" name="action" value="implecode_save_settings">
    <input type="hidden" name="settings[display_style]" value="malicious_value">
</form>
<script>document.getElementById('csrf_form').submit();</script>
</body>
</html>

3. Host the HTML page on an attacker-controlled server or use a URL shortener to obfuscate.
4. Send the link to the victim admin via email or social engineering.
5. Once the victim clicks the link, the forged request is executed, modifying the plugin settings.

Expected Outcome: The attacker can change plugin configuration, delete products, or perform other administrative actions without authorization.

Blue Team (Defense & Detection)

Detection Steps:

1. Monitor WordPress admin logs for unexpected AJAX requests to admin-ajax.php with actions like implecode_save_settings or implecode_delete_product.
2. Check for unusual changes in plugin settings or product catalog entries.
3. Review HTTP Referer headers in server logs for requests originating from external domains.

Mitigation:

• Implement a Web Application Firewall (WAF) rule to block requests to admin-ajax.php that lack a valid Referer header matching the site's domain.
• Use a security plugin (e.g., Wordfence) that adds CSRF protection to all admin actions.
• Educate administrators about phishing attacks and the importance of verifying links.

Indicators of Compromise (IOCs)

• Network IOCs:

  • HTTP POST requests to /wp-admin/admin-ajax.php with action=implecode_save_settings or action=implecode_delete_product from external Referer headers.
  • Unusual patterns in server access logs showing repeated POST requests to admin AJAX endpoints without a valid nonce.

• Host IOCs:

  • Modified wp_options table entries for implecode_settings.
  • Unexpected product deletions or changes in the wp_posts table for al_product post type.
  • Presence of malicious HTML files on the server (if attacker uploaded a CSRF payload).

• File IOCs:

  • Changes to plugin files in /wp-content/plugins/product-catalog-simple/ (e.g., modified admin-ajax.php or includes/settings.php).

Detection Engineering

YARA Rule

rule Detect_CSRF_Exploit_ProductCatalogSimple {
    meta:
        description = "Detects CSRF exploit attempts against Product Catalog Simple plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-62061"
    strings:
        $ajax_action = "implecode_save_settings" nocase
        $ajax_action2 = "implecode_delete_product" nocase
        $post_param = "settings[" nocase
    condition:
        any of ($ajax_action, $ajax_action2) and $post_param
}

Sigma Rule

title: CSRF Exploit Against Product Catalog Simple Plugin
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects HTTP POST requests to WordPress admin-ajax.php with CSRF exploit parameters for Product Catalog Simple plugin
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains|all:
            - 'action=implecode_save_settings'
            - 'settings['
    condition: selection
falsepositives:
    - Legitimate admin actions (if nonce is present, this rule may generate false positives)
level: medium

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-62061 - CSRF Exploit Against Product Catalog Simple Plugin";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"admin-ajax.php"; http_uri;
    content:"action=implecode_save_settings"; http_client_body;
    content:"settings["; http_client_body;
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
    reference:cve,2025-62061;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until an official patch is released by impleCode.
2. Implement a WAF rule to block POST requests to admin-ajax.php that contain action=implecode_save_settings or action=implecode_delete_product without a valid nonce.
3. Add a custom CSRF token to the plugin's admin forms by modifying the plugin code (if you have development resources):
   • Add wp_nonce_field('implecode_action', '_wpnonce'); to the plugin's admin form templates.
   • Add check_admin_referer('implecode_action'); at the beginning of each AJAX handler.

Long-Term Recommendations:

• Monitor the WordPress plugin repository for updates to Product Catalog Simple.
• Conduct a security audit of all WordPress plugins in use, focusing on CSRF and XSS vulnerabilities.
• Implement a Content Security Policy (CSP) to reduce the impact of social engineering attacks.

Workaround (if patching is not possible):

• Restrict access to wp-admin/ directory using IP whitelisting or .htaccess authentication.
• Use a security plugin that adds CSRF protection to all admin actions (e.g., Wordfence, Sucuri).

Valters IT