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Cross-site Scripting occurrences in Interview Management System
A vulnerability was found in SourceCodester Interview Management System 1.0 and classified as problematic. This issue affects some unknown processing of the file /addQuestion.php. The manipulation of the argument question with the input leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-205673 was assigned to this vulnerability. (2022-08-05, CVE-2022-2685)
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>