Canteen Management System (food.

Canteen Management System (food.php) is vulnerable to a Cross-site scripting(Persistent)

url: youthappam/food.php

Abstract:

Line 68 of food.php sends unvalidated data to a web browser, which can result in the browser executing malicious code.

Explanation:

Cross-site scripting (XSS) vulnerabilities occur when:

1. Data enters a web application through an untrusted source. In the case of persistent (also known as stored) XSS, the untrusted source is typically a database or other back-end data store, while in the case of reflected XSS it is typically a web request.

In this case, the data enters at query() in food.php at line 7.

2. The data is included in dynamic content that is sent to a web user without being validated.

In this case, the data is sent at builtin_echo() in food.php at line 68.

1.png 2.png 3.png 4.png 5.png 6.png

It is clear that the application doesn't perform data validation and trust user-supplied data, we can use the below XSS payload as input which may be stored in the application.

payload ：

<script>alert(123)</script>