CVE-2024-51568: CyberPanel RCE Vulnerability

CVE-2024-51568 Overview

CVE-2024-51568 is a critical command injection vulnerability affecting CyberPanel (also known as Cyber Panel) versions prior to 2.3.5. The vulnerability exists in the ProcessUtilities.outputExecutioner() function, which fails to properly sanitize the completePath parameter. This flaw enables unauthenticated attackers to achieve remote code execution through the /filemanager/upload endpoint (File Manager upload functionality) by injecting shell metacharacters.

Critical Impact

Unauthenticated remote code execution allowing complete server compromise through the CyberPanel File Manager upload functionality.

Affected Products

• CyberPanel versions before 2.3.5

Discovery Timeline

• 2024-10-29 - CVE CVE-2024-51568 published to NVD
• 2025-07-07 - Last updated in NVD database

Technical Details for CVE-2024-51568

Vulnerability Analysis

This vulnerability is classified as CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'). The flaw resides in the File Manager component of CyberPanel, specifically within the ProcessUtilities.outputExecutioner() function that processes file upload requests.

The critical nature of this vulnerability stems from the fact that it requires no authentication to exploit. An attacker with network access to a vulnerable CyberPanel instance can send specially crafted requests to the /filemanager/upload endpoint containing shell metacharacters in the completePath parameter. These metacharacters are not properly sanitized before being passed to the underlying operating system shell, allowing arbitrary command execution with the privileges of the CyberPanel web server process.

Root Cause

The root cause of this vulnerability is improper input validation within the ProcessUtilities.outputExecutioner() sink function. The completePath parameter accepts user-controlled input that is incorporated into shell commands without adequate sanitization or escaping of shell metacharacters. This allows attackers to break out of the intended command context and inject arbitrary commands.

Attack Vector

The attack vector is network-based and requires no user interaction or authentication. An attacker can exploit this vulnerability by sending a malicious HTTP request to the /filemanager/upload endpoint with shell metacharacters embedded in the file path parameter. Common shell metacharacters such as semicolons (;), backticks (`), pipe symbols (|), and command substitution syntax ($(...)) can be used to chain additional commands that will be executed on the server.

For detailed technical analysis of this vulnerability, refer to the Dreyand Code Review: CyberPanel RCE which provides an in-depth examination of the exploitation mechanism.

Detection Methods for CVE-2024-51568

Indicators of Compromise

• Unexpected HTTP POST requests to /filemanager/upload containing shell metacharacters such as ;, |, `, $(, or && in path parameters
• Anomalous process spawning from the CyberPanel web server process (e.g., sh, bash, wget, curl, nc)
• Unusual outbound network connections originating from the CyberPanel server
• Unauthorized file creation or modification in web-accessible directories or system locations

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing command injection patterns targeting the /filemanager/upload endpoint
• Monitor HTTP access logs for suspicious requests to File Manager endpoints with encoded or obfuscated shell metacharacters
• Deploy endpoint detection and response (EDR) solutions to identify unexpected child processes spawned by the CyberPanel web server
• Establish baseline process behavior and alert on deviation patterns indicative of command execution

Monitoring Recommendations

• Enable detailed logging for all requests to CyberPanel File Manager endpoints
• Configure real-time alerting for process execution anomalies on CyberPanel servers
• Implement network segmentation and monitor for lateral movement attempts from CyberPanel hosts
• Review server access logs regularly for reconnaissance activities targeting CyberPanel infrastructure

How to Mitigate CVE-2024-51568

Immediate Actions Required

• Upgrade CyberPanel to version 2.3.5 or later immediately
• If immediate patching is not possible, restrict network access to the CyberPanel management interface
• Implement WAF rules to block requests containing shell metacharacters in file path parameters
• Consider temporarily disabling the File Manager functionality until patching is complete

Patch Information

CyberPanel has addressed this vulnerability in version 2.3.5. Organizations running affected versions should upgrade immediately by following the official update procedures. For release details and update instructions, refer to the CyberPanel Blog v2.3.5 and CyberPanel Change Logs.

Workarounds

• Restrict access to the CyberPanel management interface to trusted IP addresses only using firewall rules
• Deploy a reverse proxy or WAF in front of CyberPanel to filter malicious requests
• Disable the File Manager module if it is not essential for operations
• Implement network segmentation to limit the potential impact of a successful compromise

# Example: Restrict CyberPanel access to trusted IP using iptables
iptables -A INPUT -p tcp --dport 8090 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8090 -j DROP