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Cross-site Scripting occurrences in Student Attendance Management System
A vulnerability was found in Student Attendance Management System. It has been classified as problematic. Affected is an unknown function of the file createClass.php. The manipulation of the argument className leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. VDB-213846 is the identifier assigned to this vulnerability. (2022-11-17, CVE-2022-4053)
A Stored Cross Site Scripting (XSS) vulnerability exists in Sourcecodester Student Attendance Management System 1.0 via the couse filed in index.php. (2022-03-29, CVE-2021-45866)
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>