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Cross-site Scripting occurrences in Automatic Question Paper Generator System
A vulnerability was found in Automatic Question Paper Generator System 1.0. It has been classified as problematic. This affects the file /aqpg/users/login.php of the component My Account Page. The manipulation of the argument First Name/Middle Name/Last Name leads to cross site scripting. It is possible to initiate the attack remotely. (2022-03-29, CVE-2022-1076)
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>