CVE-2003-1425 in cPanel
Summary
by MITRE
guestbook.cgi in cPanel 5.0 allows remote attackers to execute arbitrary commands via the template parameter.
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Analysis
by VulDB Data Team • 07/13/2025
The vulnerability described in CVE-2003-1425 represents a critical command injection flaw within the guestbook.cgi script of cPanel version 5.0. This issue arises from improper input validation and sanitization mechanisms that fail to properly handle user-supplied data within the template parameter. The flaw exists in the web-based administrative interface of cPanel, which is widely used by system administrators and hosting providers to manage their web servers and applications. The vulnerability allows remote attackers to execute arbitrary commands on the target system with the privileges of the web server process, potentially leading to complete system compromise.
The technical implementation of this vulnerability stems from the insecure handling of the template parameter in the guestbook.cgi script. When user input is directly incorporated into system commands without proper sanitization or validation, it creates an environment where malicious actors can inject shell commands. This type of vulnerability falls under the Common Weakness Enumeration category CWE-77, which specifically addresses Command Injection flaws. The weakness occurs because the application does not properly escape or filter special characters that could be interpreted by the underlying operating system shell, allowing attackers to chain commands and manipulate the execution flow of the web application.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with a potential foothold for further exploitation within the target environment. Since cPanel serves as a central management interface for web hosting environments, successful exploitation could lead to unauthorized access to multiple websites hosted on the same server, data theft, and potential lateral movement within the network infrastructure. The vulnerability is particularly dangerous because it does not require authentication to exploit, making it accessible to anyone who can reach the affected web application. Attackers could leverage this flaw to install backdoors, modify system configurations, or exfiltrate sensitive information from the compromised server.
Mitigation strategies for CVE-2003-1425 should focus on immediate patching of the affected cPanel version, as well as implementing proper input validation and sanitization measures. Organizations should ensure that all web applications properly escape or encode user input before using it in system commands, implementing principle of least privilege for web server processes, and monitoring for suspicious command execution patterns. The remediation efforts should also include network segmentation to limit access to administrative interfaces, implementing web application firewalls, and conducting regular security assessments to identify similar vulnerabilities. This vulnerability aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter and T1078.004 for Valid Accounts, as exploitation typically involves executing commands through legitimate administrative interfaces while maintaining persistent access to the compromised system.