CVE-2024-49607: WP Dropbox Dropins RCE Vulnerability

CVE-2024-49607 Overview

CVE-2024-49607 is an Unrestricted Upload of File with Dangerous Type vulnerability affecting the WP Dropbox Dropins WordPress plugin developed by redhopit. This critical security flaw allows unauthenticated attackers to upload malicious files, including web shells, to vulnerable WordPress installations. The vulnerability stems from improper validation of uploaded file types, enabling attackers to bypass security controls and achieve remote code execution on affected web servers.

Critical Impact

This vulnerability enables unauthenticated attackers to upload web shells and achieve complete server compromise, potentially leading to full control of the WordPress installation and underlying web server.

Affected Products

• WP Dropbox Dropins plugin version 1.0 and earlier
• WordPress installations running the vulnerable wp-dropbox-dropins plugin
• Redwanhilali WP Dropbox Dropins for WordPress

Discovery Timeline

• 2024-10-20 - CVE-2024-49607 published to NVD
• 2026-04-01 - Last updated in NVD database

Technical Details for CVE-2024-49607

Vulnerability Analysis

This vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type). The WP Dropbox Dropins plugin fails to properly validate file types during the upload process, allowing attackers to submit files with dangerous extensions such as .php. When these malicious files are uploaded and subsequently accessed via a web request, the web server executes them, granting attackers the ability to run arbitrary code within the context of the web application.

The attack requires no authentication and can be executed remotely over the network. Once a web shell is successfully uploaded, attackers can execute system commands, access sensitive files, modify database content, and potentially pivot to other systems within the network. The lack of user interaction requirements makes this vulnerability particularly dangerous for automated exploitation.

Root Cause

The root cause of CVE-2024-49607 lies in the plugin's failure to implement proper file type validation and sanitization during the upload process. The vulnerable code does not adequately check file extensions, MIME types, or file content to ensure only safe file types are accepted. This oversight allows attackers to bypass intended restrictions and upload executable PHP files or other dangerous file types that the web server will interpret and execute.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no privileges or user interaction. An attacker can craft a malicious HTTP request containing a web shell payload and submit it to the vulnerable upload endpoint. The exploitation flow typically involves:

1. Identifying a WordPress installation with the vulnerable WP Dropbox Dropins plugin
2. Crafting a malicious file upload request containing a PHP web shell
3. Submitting the request to the vulnerable upload endpoint
4. Accessing the uploaded web shell via the web server to execute arbitrary commands

For technical details on this vulnerability, refer to the Patchstack WordPress Vulnerability Advisory.

Detection Methods for CVE-2024-49607

Indicators of Compromise

• Presence of unexpected PHP files in WordPress upload directories or plugin folders
• Web server access logs showing requests to suspicious PHP files with unusual names
• Outbound network connections originating from the web server process
• Modified file timestamps on server-side scripts outside of normal update windows
• Evidence of command execution or system enumeration activity in server logs

Detection Strategies

• Monitor WordPress installations for the presence of WP Dropbox Dropins plugin version 1.0 or earlier
• Implement file integrity monitoring on WordPress directories to detect unauthorized file additions
• Analyze web server access logs for POST requests to plugin upload endpoints followed by GET requests to new PHP files
• Deploy web application firewalls with rules to detect web shell upload attempts
• Scan uploaded files for known web shell signatures and malicious PHP patterns

Monitoring Recommendations

• Enable verbose logging on web servers to capture detailed request information for forensic analysis
• Implement real-time alerting for new executable file creation in WordPress directories
• Monitor for anomalous outbound connections from web server processes
• Review plugin installation logs for vulnerable versions of WP Dropbox Dropins

How to Mitigate CVE-2024-49607

Immediate Actions Required

• Immediately deactivate and remove the WP Dropbox Dropins plugin from all WordPress installations
• Conduct a thorough security audit of WordPress directories to identify and remove any uploaded web shells
• Review web server access logs for evidence of exploitation attempts
• Change all administrative credentials and database passwords if compromise is suspected
• Consider temporarily restricting file upload capabilities across the WordPress installation

Patch Information

As of the published vulnerability data, the WP Dropbox Dropins plugin through version 1.0 remains vulnerable. No official patch has been confirmed. Website administrators should remove the plugin entirely until a secure version is released. Monitor the Patchstack advisory for updates regarding vendor remediation efforts.

Workarounds

• Remove the WP Dropbox Dropins plugin from all WordPress installations immediately
• Implement web application firewall rules to block requests to the vulnerable plugin endpoints
• Restrict PHP execution in WordPress upload directories via web server configuration
• Apply file upload restrictions at the server level to prevent execution of uploaded scripts

# Apache configuration to prevent PHP execution in uploads directory
<Directory "/var/www/html/wp-content/uploads">
    <FilesMatch "\.php$">
        Require all denied
    </FilesMatch>
</Directory>

# Nginx configuration equivalent
location ~* /wp-content/uploads/.*\.php$ {
    deny all;
}