This article is a part of our Vulnerability Database (back to index)
Cross-site Scripting occurrences in School Club Application System
A stored cross-site scripting (XSS) vulnerability in /scas/?page=clubs/application_form&id=7 of School Club Application System v0.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the firstname parameter. (2022-05-25, CVE-2022-29359)
A vulnerability, which was classified as problematic, has been found in School Club Application System 1.0. This issue affects access to /scas/admin/. The manipulation of the parameter page with the input %22%3E%3Cimg%20src=x%20onerror=alert(1)%3E leads to a reflected cross site scripting. The attack may be initiated remotely and does not require any form of authentication. The exploit has been disclosed to the public and may be used. (2022-04-09, CVE-2022-1288)
Why Cross-site Scripting can be dangerous
Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.
The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:
https://server.com/confirmation?message=Transaction+Complete
what results in:
<span>Confirmation: Transaction Complete</span>
In that case the message can be modified to become a valid Javascript code, e.g.:
https://server.com/confirmation?message=<script>dangerous javascript code here</script>
and it will be executed locally by the user's browser with full access to the user's personal application/browser data:
<span>Confirmation: <script>dangerous javascript code here</script></span>