CVE-2024-0757: Insert Or Embed Articulate Content RCE Flaw

CVE-2024-0757 Overview

CVE-2024-0757 is an unrestricted file upload vulnerability affecting the Insert or Embed Articulate Content into WordPress plugin through version 4.3000000023. The plugin fails to properly validate and filter file extensions during the import process, allowing authenticated attackers to upload malicious code concealed within zip files to the server. This vulnerability falls under CWE-434 (Unrestricted Upload of File with Dangerous Type).

Critical Impact

Authenticated attackers can bypass file extension filtering to upload malicious code via zip files, potentially leading to remote code execution, website defacement, or further compromise of the WordPress installation and underlying server.

Affected Products

• Insert or Embed Articulate Content into WordPress plugin versions up to and including 4.3000000023
• WordPress installations using the affected elearningfreak plugin
• eLearning content management systems leveraging Articulate content embedding

Discovery Timeline

• 2024-06-04 - CVE-2024-0757 published to NVD
• 2025-05-21 - Last updated in NVD database

Technical Details for CVE-2024-0757

Vulnerability Analysis

This vulnerability exists in the file import functionality of the Insert or Embed Articulate Content plugin for WordPress. The plugin is designed to allow users to embed eLearning content created with Articulate software (such as Storyline or Rise) into WordPress pages and posts. However, the plugin's file handling mechanism lacks proper validation of file extensions contained within uploaded zip archives.

When a user uploads a zip file containing Articulate content, the plugin extracts and processes the contents without adequately checking whether the extracted files contain potentially dangerous file types. This oversight allows an attacker with authenticated access (contributor level or above) to craft a malicious zip archive containing executable scripts (such as PHP files) that, once extracted, can be accessed and executed on the web server.

Root Cause

The root cause of this vulnerability is insufficient input validation in the file upload and extraction routine. The plugin does not implement a proper allowlist of safe file extensions or content-type verification for files extracted from uploaded zip archives. This allows files with dangerous extensions (such as .php, .phtml, or other server-executable file types) to be written to web-accessible directories during the extraction process.

Attack Vector

The attack requires network access and authenticated credentials with at least contributor-level privileges on the WordPress installation. An attacker would:

1. Create a malicious zip file containing a PHP webshell or other malicious script alongside legitimate Articulate content files
2. Use the plugin's import functionality to upload the crafted zip archive
3. The plugin extracts all files without proper extension filtering
4. Access the uploaded malicious script through a direct URL to execute arbitrary code on the server

The vulnerability can be exploited through the WordPress admin interface using the plugin's standard content import workflow. The malicious payload is hidden within what appears to be legitimate eLearning content, making it difficult to detect through casual inspection.

Detection Methods for CVE-2024-0757

Indicators of Compromise

• Unexpected PHP files or other server-side scripts in WordPress upload directories, particularly within Articulate content folders
• Web server access logs showing requests to unusual file paths within plugin upload directories
• New or modified files with executable extensions (.php, .phtml, .php5) in the wp-content/uploads/ directory structure
• Evidence of webshell activity such as command execution or file system manipulation

Detection Strategies

• Implement file integrity monitoring on WordPress upload directories to detect unauthorized file additions
• Configure web application firewalls to alert on PHP file uploads through plugin interfaces
• Review WordPress audit logs for suspicious file upload activity from contributor or author accounts
• Scan upload directories regularly for files with executable extensions that should not be present

Monitoring Recommendations

• Enable detailed logging for all file upload operations in WordPress
• Monitor for unusual POST requests to the plugin's AJAX handlers or import endpoints
• Set up alerts for new files with server-executable extensions appearing in content directories
• Implement real-time file system monitoring on web-accessible upload directories

How to Mitigate CVE-2024-0757

Immediate Actions Required

• Update the Insert or Embed Articulate Content plugin to the latest version if a patched version is available
• Audit existing uploaded content for any suspicious or unexpected files with executable extensions
• Temporarily disable the plugin if no patch is available and file uploads through this functionality are not business-critical
• Review user accounts with contributor-level access or higher for any signs of compromise
• Restrict plugin access to trusted administrators only until the vulnerability is addressed

Patch Information

Review the WPScan Vulnerability Report for the latest information on available patches and recommended update procedures. Contact the plugin vendor (elearningfreak) for guidance on obtaining a fixed version if one is not yet available through the WordPress plugin repository.

Workarounds

• Implement server-level restrictions to prevent execution of PHP files in upload directories using .htaccess rules or web server configuration
• Configure WordPress file permissions to restrict write access to upload directories
• Use a Web Application Firewall (WAF) to block requests containing potentially malicious payloads in file uploads
• Limit the number of users with contributor-level or higher access to reduce the attack surface

# Apache .htaccess configuration to prevent PHP execution in uploads
# Place this file in wp-content/uploads/ directory
<FilesMatch "\.(?:php|phtml|php[3-7]?|pht)$">
    Order Allow,Deny
    Deny from all
</FilesMatch>

# Nginx configuration alternative (add to server block)
# location ~* /wp-content/uploads/.*\.php$ {
#     deny all;
# }