CVE-2024-52401: Hacklog DownloadManager CSRF Vulnerability

CVE-2024-52401 Overview

CVE-2024-52401 is a Cross-Site Request Forgery (CSRF) vulnerability in the Hacklog DownloadManager WordPress plugin developed by HuangYe WuDeng. This vulnerability allows attackers to upload a web shell to a web server by exploiting insufficient CSRF protections in the plugin's file upload functionality. A successful attack could grant unauthorized remote code execution capabilities on vulnerable WordPress installations.

Critical Impact

Attackers can exploit this CSRF vulnerability to upload malicious web shells, potentially leading to complete server compromise, data theft, and persistent backdoor access to WordPress sites running vulnerable versions of the Hacklog DownloadManager plugin.

Affected Products

• Hacklog DownloadManager WordPress Plugin versions up to and including 2.1.4
• WordPress installations with the hacklog-downloadmanager plugin installed

Discovery Timeline

• 2024-11-19 - CVE-2024-52401 published to NVD
• 2026-04-01 - Last updated in NVD database

Technical Details for CVE-2024-52401

Vulnerability Analysis

This vulnerability is classified as CWE-352 (Cross-Site Request Forgery). The Hacklog DownloadManager plugin fails to properly validate CSRF tokens on file upload endpoints, allowing attackers to craft malicious requests that, when executed by an authenticated administrator, can upload arbitrary files including PHP web shells.

The attack chain involves tricking an authenticated WordPress administrator into visiting a malicious page or clicking a crafted link. When the administrator's browser makes the forged request, the server processes the file upload without verifying the legitimacy of the request source, as the administrator's valid session cookie is automatically included.

Root Cause

The root cause of this vulnerability is the absence or improper implementation of CSRF token validation (nonce verification) in the plugin's file upload handling functions. WordPress provides built-in nonce functions (wp_nonce_field(), wp_verify_nonce(), and check_admin_referer()) specifically to prevent such attacks, but the vulnerable plugin versions do not properly utilize these security mechanisms.

Attack Vector

The attack requires social engineering to lure an authenticated WordPress administrator to interact with a malicious web page or link. The attacker hosts a page containing a hidden form or JavaScript that automatically submits a file upload request to the victim's WordPress site. Since the victim is already authenticated, their browser sends the request with valid session cookies, and the server processes the malicious upload without verification.

The vulnerability is particularly dangerous because:

• It can be exploited remotely via the network
• No prior authentication on the target system is required by the attacker
• Successful exploitation results in arbitrary file upload, which can lead to remote code execution
• The uploaded web shell provides persistent access to the compromised server

Detection Methods for CVE-2024-52401

Indicators of Compromise

• Unexpected PHP files in WordPress upload directories, particularly files with obfuscated code or shell-like functionality
• Unusual file upload activity in WordPress admin logs, especially uploads that occur when administrators are not actively using the site
• Presence of files with suspicious names or extensions in /wp-content/uploads/ or plugin directories
• Web server access logs showing requests to unfamiliar PHP files with command execution parameters

Detection Strategies

• Monitor WordPress file system integrity using security plugins that track file changes
• Review Apache/Nginx access logs for POST requests to the Hacklog DownloadManager plugin endpoints from external referrers
• Implement Web Application Firewall (WAF) rules to detect and block CSRF attack patterns
• Deploy endpoint detection and response (EDR) solutions like SentinelOne to identify web shell activity and suspicious file operations

Monitoring Recommendations

• Enable WordPress debug logging and monitor for unauthorized file upload events
• Configure file integrity monitoring (FIM) for the WordPress installation directory
• Set up alerts for new PHP files created in writable directories
• Monitor outbound network connections from the web server that could indicate command-and-control communication from an uploaded web shell

How to Mitigate CVE-2024-52401

Immediate Actions Required

• Audit your WordPress installations to identify if the Hacklog DownloadManager plugin is installed
• If the plugin is installed and required, check the current version against the vulnerable version (2.1.4 and earlier)
• Consider deactivating and removing the plugin until a patched version is confirmed
• Review file system for any suspicious PHP files that may have been uploaded as web shells
• Implement additional WAF rules to block suspicious file upload requests

Patch Information

Refer to the Patchstack Vulnerability Report for the latest information on available patches and remediation guidance. Organizations should monitor the plugin developer's official channels for security updates addressing this vulnerability.

Workarounds

• Disable the Hacklog DownloadManager plugin until a security patch is available
• Implement strict file upload restrictions at the web server level to limit uploadable file types
• Use a Web Application Firewall (WAF) with rules to detect and block CSRF attacks targeting file upload functionality
• Restrict WordPress admin panel access to specific IP addresses or require VPN access
• Educate administrators about phishing risks and the importance of not clicking unknown links while logged into WordPress

# Example: Restrict admin access by IP in .htaccess
<Files wp-login.php>
Order Deny,Allow
Deny from all
Allow from 192.168.1.0/24
</Files>

# Block PHP execution in uploads directory
<Directory "/var/www/html/wp-content/uploads">
<Files "*.php">
Order Deny,Allow
Deny from all
</Files>
</Directory>