Critical Vulnerability Information Affected Product Name: Gym Management System V1.0 Vulnerability Type Type: SQL Injection Vulnerable File File Path: /ajax.php?action=save_membership Version Affected Version: V1.0 Root Cause In the file , attackers can inject malicious code via the parameter, which is directly used in SQL queries without sanitization or validation. This allows attackers to forge input values, manipulate SQL queries, and perform unauthorized operations. Impact Attackers can exploit this SQL injection vulnerability to gain unauthorized database access, exfiltrate sensitive data, tamper with data, achieve full system control, or cause service disruption, posing a severe threat to system security and business continuity. Description During a security review of the , a critical SQL injection vulnerability was discovered in the file . The vulnerability stems from insufficient 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 is required to ensure system security and protect data integrity. Vulnerability Details and POC Vulnerable Parameter: Payload: Recommended Fixes 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 that database connection 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.