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Cross-site Scripting occurrences in Apartment Visitors Management System
A vulnerability was found in SourceCodester Apartment Visitor Management System. It has been classified as problematic. This affects an unknown part of the file profile.php. The manipulation leads to cross site scripting. It is possible to initiate the attack remotely. The identifier VDB-206169 was assigned to this vulnerability. (2022-08-11, CVE-2022-2773)
A vulnerability has been found in SourceCodester Apartment Visitor Management System 1.0 and classified as problematic. This vulnerability affects unknown code of the file /manage-apartment.php. The manipulation of the argument Apartment Number with the input leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-205672. (2022-08-05, CVE-2022-2684)
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>