CVE-2024-40070 in Online ID Generator System
Summary
by MITRE • 04/16/2025
Sourcecodester Online ID Generator System 1.0 was discovered to contain an arbitrary file upload vulnerability via id_generator/classes/Users.php?f=save. This vulnerability allows attackers to execute arbitrary code via a crafted PHP file.
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Analysis
by VulDB Data Team • 06/30/2025
The vulnerability identified as CVE-2024-40070 resides within the Sourcecodester Online ID Generator System version 1.0, specifically in the file id_generator/classes/Users.php at the endpoint f=save. This arbitrary file upload vulnerability represents a critical security flaw that directly enables remote code execution capabilities for attackers who successfully exploit the system. The vulnerability stems from inadequate input validation and sanitization mechanisms within the file upload functionality, allowing malicious actors to bypass security restrictions and upload potentially harmful files to the server.
The technical implementation of this vulnerability involves the lack of proper file type checking and validation within the Users.php script. When users attempt to save their data through the f=save endpoint, the system fails to properly validate the uploaded file extensions, MIME types, or file contents. This absence of validation creates a pathway for attackers to upload PHP files containing malicious code, which can then be executed on the target server with the privileges of the web application. The vulnerability is classified under CWE-434 which specifically addresses "Unrestricted Upload of File with Dangerous Type" and aligns with ATT&CK technique T1190 for "Exploit Public-Facing Application" and T1059.007 for "Command and Scripting Interpreter: PowerShell" when the uploaded files contain PowerShell commands or when attackers leverage the system to execute shell commands through the PHP files.
The operational impact of this vulnerability extends beyond simple unauthorized file uploads, as it provides attackers with full control over the affected system. Once an attacker successfully uploads a malicious PHP file, they can execute arbitrary commands on the server, potentially leading to complete system compromise, data exfiltration, or the establishment of persistent backdoors. The vulnerability affects the entire user management functionality of the online ID generator system, making it a critical target for exploitation. Organizations relying on this system face significant risks including unauthorized access to user data, potential data breaches, and the possibility of using the compromised system as a launchpad for further attacks within the network infrastructure.
Mitigation strategies for this vulnerability must address the core issue of insufficient file validation and implement comprehensive security controls. The primary recommendation involves implementing strict file type validation that rejects all file uploads except for explicitly permitted extensions such as images or documents. The system should employ multiple layers of validation including MIME type checking, file content analysis, and implementation of secure file naming conventions. Organizations should also implement proper input sanitization, restrict file upload directories, and ensure that uploaded files are stored outside the web root directory. Additionally, the system should enforce proper access controls and authentication mechanisms to prevent unauthorized access to the file upload functionality. Network segmentation and monitoring should be implemented to detect and prevent suspicious file upload activities. This vulnerability highlights the importance of following secure coding practices and implementing defense-in-depth strategies to protect against arbitrary file upload attacks. The mitigation approach should align with industry standards such as OWASP Top 10 and NIST cybersecurity frameworks, emphasizing the need for comprehensive security controls including proper validation, access control, and monitoring mechanisms to prevent exploitation of similar vulnerabilities in the future.