Campcodes Grocery Sales and Inventory System Cross-Site Scripting Vulnerability

A cross-site scripting (XSS) vulnerability has been identified in Campcodes Grocery Sales and Inventory System version 1.0. The issue arises in the file '/index.php?page=users', where the 'page' 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 victim's browser, potentially leading to the theft of cookies, session tokens, or other sensitive information. The vulnerability can be exploited remotely, without any authentication, although it requires user interaction from the victim.

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, unauthorized actions performed on behalf of the user, defacement of web pages, redirection to malicious sites, or even control over the user's browser.

Reproduction

To reproduce this vulnerability, navigate to the 'users' page parameter in the index.php file of the Campcodes Grocery Sales and Inventory System. Inject a script payload, such as an alert script, into the 'page' parameter. The injected script will be executed in the browser, demonstrating the cross-site scripting vulnerability.

Remediation

It is recommended to implement proper output encoding for user inputs, validate and filter input data to reject or escape potentially malicious content, and consider using a Content Security Policy (CSP) to restrict the execution of unauthorized scripts. Additionally, setting secure and HttpOnly flags for sensitive cookies can help mitigate the risk of cookie theft.