Critical Vulnerability Information Affected Product Name: Sales and Inventory System Version: V1.0 Link: https://www.campcodes.com/downloads/sales-and-inventory-system-with-credit-management-using-php-source-code/ Vulnerable File File Path: /pages/purchase_add.php Vulnerability Type Type: SQL Injection Root Cause The vulnerability arises in where user input from the parameter is directly used in SQL queries without validation or filtering, leading to an SQL injection flaw. Impact Attackers can exploit this vulnerability to gain unauthorized database access, leak sensitive data, modify or delete 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 "Sales and Inventory System", a critical SQL injection vulnerability was identified in the file. This vulnerability stems from insufficient validation of the parameter, allowing attackers to inject malicious SQL queries. As a result, attackers can gain unauthorized access to the database, alter or delete critical sensitive information. Immediate remediation is required to ensure system security and protect data integrity. Vulnerability Details and POC Vulnerable Parameter: Payload Example: Recommended Fixes 1. Use prepared statements with parameter binding. 2. Implement input validation and filtering. 3. Minimize database user privileges. 4. Conduct regular security audits.