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Cross-site Scripting occurrences in E-commerce Website
A cross-site scripting (XSS) vulnerability in /public/admin/index.php?add_product of E-Commerce Website v1.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Product Title text field. (2022-05-03, CVE-2022-27330)
Cross-site scripting (XSS) vulnerability in SourceCodester E-Commerce Website v 1.0 allows remote attackers to inject arbitrary web script or HTM via the subject field to feedback_process.php. (2021-07-23, CVE-2021-25204)
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>