Key Information Affected Product Product Name: Complaint Management System Version: V1.0 Affected File: /users/index.php Vulnerability Type Type: SQL Injection Root Cause Due to insufficient validation of user input for the parameter in the file, attackers can inject malicious SQL code directly into SQL queries, thereby manipulating the queries and performing unauthorized operations. Impact Attackers can exploit this SQL injection vulnerability to gain unauthorized access to the database, leak sensitive data, tamper with data, achieve full system control, or even cause service disruption, posing a serious threat to system security and business continuity. Description During a security review of the "Complaint Management System," a critical SQL injection vulnerability was discovered in the file. This vulnerability stems from inadequate validation of user input for the parameter, allowing attackers to inject malicious SQL queries. As a result, attackers can gain unauthorized access to the database, modify or delete data, and access sensitive information. Immediate remediation measures are required to ensure system security and protect data integrity. Vulnerability Details and POC Vulnerable Parameter: Payload: Recommended Remediation 1. Use Prepared Statements and Parameter Binding: Prepared statements prevent SQL injection by separating SQL code from user input data. When using prepared statements, user-supplied values are treated as plain data and not interpreted as SQL code. 2. Input Validation and Filtering: Strictly validate and filter user input to ensure it conforms to expected formats. 3. Minimize Database User Privileges: Ensure database-connected accounts have only the minimum necessary privileges. Avoid using accounts with elevated privileges (e.g., "root" or "admin") for routine operations. 4. Regular Security Audits: Conduct regular code and system security audits to promptly identify and remediate potential vulnerabilities.