itsourcecode Document Management System SQL Injection Vulnerability in deluser.php

A SQL injection vulnerability exists in the itsourcecode Document Management System version 1.0, specifically within the deluser.php file. The issue arises from the application's failure to properly sanitize the user2del parameter, allowing attackers to inject malicious SQL code. This vulnerability can be exploited remotely without authentication, potentially leading to unauthorized database access, data manipulation, and disruption of service.

Impact

Exploitation of this vulnerability allows for SQL injection, which could be used to access, modify, or delete database information. In some cases, such vulnerabilities can be leveraged to execute administrative operations on the database or, in certain configurations, to execute commands on the server operating system.

Reproduction

The vulnerability can be reproduced by sending a POST request to deluser.php with the user2del parameter. The injected SQL payload can be crafted to exploit the vulnerability, such as by using boolean-based blind SQL injection techniques or error-based SQL injection techniques.

Remediation

It is recommended to use prepared statements and parameter binding to prevent SQL injection. Additionally, input validation and filtering should be implemented to ensure user input conforms to expected formats. Minimizing database user permissions and conducting regular security audits can also help mitigate such vulnerabilities.