Water Management System Cross-Site Scripting Vulnerability in add_vendor.php

A cross-site scripting (XSS) vulnerability has been identified in Water Management System version 1.0, specifically within the add_vendor.php file. This issue allows attackers to inject malicious scripts that could be executed in the context of the user's browser.

Impact

Exploitation of this vulnerability allows for cross-site scripting, where an attacker can inject and execute scripts in the context of the user's session. This could lead to session hijacking, theft of authentication cookies, phishing attacks, data theft, or manipulation of displayed content.

Reproduction

To reproduce this vulnerability, log into the application and navigate to the Vendors section. Once there, access the Add Vendors page. In the Vendor Name field, enter a crafted payload that includes a script tag, such as one that alerts the document's cookies. Fill in the other required fields and submit the form. The injected script will be executed, demonstrating the XSS vulnerability.

Remediation

To mitigate this vulnerability, sanitize user input by implementing strict validation and escaping special characters. Encode user input before displaying it in the browser, and consider applying a Content Security Policy to restrict the execution of inline scripts.