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Cross-site Scripting occurrences in Alphaware - Simple E-commerce System
A vulnerability, which was classified as problematic, has been found in SourceCodester Alphaware Simple E-Commerce System. Affected by this issue is some unknown functionality of the file stockin.php. The manipulation of the argument id with the input '"> leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-205670 is the identifier assigned to this vulnerability. (2022-08-05, CVE-2022-2682)
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>