SourceCodester Pharmacy Sales and Inventory System Cross-Site Scripting Vulnerability

A cross-site scripting (XSS) vulnerability has been identified in SourceCodester Pharmacy Sales and Inventory System version 1.0. The issue resides in the file '/index.php?page=product', where the 'id' parameter is not properly validated or encoded before being output to users. This flaw allows attackers to inject malicious scripts that are executed in the context of the user's browser, potentially leading to the theft of cookies, session tokens, or other sensitive information. The vulnerability can be exploited remotely without requiring any authentication.

Impact

Exploitation of this vulnerability allows for cross-site scripting, where injected scripts are executed in the context of the user's browser. This could lead to the theft of cookies or session tokens, defacement of web pages, redirection to malicious sites, or unauthorized actions performed on behalf of the user.

Reproduction

To reproduce this vulnerability, navigate to the '/index.php?page=product' file and manipulate the 'id' parameter by injecting a script payload, such as a prompt script. This can be done by adding the script injection into the URL where the 'id' parameter is accepted.

Remediation

It is recommended to implement proper output encoding for user inputs, validate and filter input data to reject malicious content, use a Content Security Policy to restrict script sources, set secure and HttpOnly flags for sensitive cookies, and conduct regular security audits to identify and address potential vulnerabilities.