PHPGurukul User Management System SQL Injection Vulnerability in Signup.php

A SQL injection vulnerability exists in PHPGurukul User Management System version 1.0, specifically in the signup.php file. The issue arises from inadequate validation of the 'emailid' parameter, allowing attackers to inject malicious SQL queries. This vulnerability can be exploited remotely, without authentication, leading to unauthorized database access and manipulation.

Impact

Exploitation of this vulnerability allows for SQL injection, enabling attackers to interfere with the application's database queries. This could result in unauthorized data access, data manipulation, and in some cases, executing administrative operations on the database.

Reproduction

To reproduce this vulnerability, send a POST request to signup.php with an injected payload in the emailid parameter. The payload should be crafted to exploit the SQL injection vulnerability, such as using SQL injection techniques to bypass application logic or access restricted data.

Remediation

It is recommended to use prepared statements or parameterized queries to prevent SQL injection vulnerabilities. Additionally, input validation and sanitization should be implemented to ensure that user inputs do not contain malicious data that could be used to manipulate SQL queries.