SQL Column Injection in Multi-Vendor Grocery System Registration Endpoint (PoC + Fix)

Vulnerability Overview Vulnerability Name: Multi-Vendor Online Grocery Management System 1.0 - SQL Column Injection via Registration Endpoint #6 Vulnerability Type: SQL Injection — Column Name Injection (CWE-89) Affected Product: Multi-Vendor Online Grocery Management System Vulnerability Location: function in , exploited via POST field names (keys). Impact Unauthorized attackers can inject arbitrary column attributes during client or vendor registration. Attackers can manipulate account status, override business logic defaults, set columns not exposed in the application's registration form, and even inject SQL expressions as column values. The vendor registration endpoint ( ) is also vulnerable to the same issue. Remediation 1. Implement a whitelist for registration fields: Replace dynamic key iteration with an explicit list of allowed columns. 2. Use prepared statements: Employ fixed column names in query templates so that user input only affects values, not column names or SQL structure. 3. Apply the same fix to : The vendor registration endpoint has the same vulnerability and requires identical remediation. 4. Input validation: Reject POST field names containing characters outside the range before processing. Proof of Concept (POC) Code Conclusion This vulnerability allows unauthorized attackers to inject arbitrary column attributes during client or vendor registration, thereby manipulating account status, overriding business logic defaults, etc. Remediation measures include implementing a whitelist for registration fields, using prepared statements, applying the same fix to , and enforcing input validation.

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SQL Column Injection in Multi-Vendor Grocery System Registration Endpoint (PoC + Fix)

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