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Cross-site Scripting occurrences in G Web Development Software
There is a cross-site scripting (XSS) vulnerability in an NI Web Server component installed with several NI products. Depending on the product(s) in use, remediation guidance includes: install SystemLink version 2021 R3 or later, install FlexLogger 2022 Q2 or later, install LabVIEW 2021 SP1, install G Web Development 2022 R1 or later, or install Static Test Software Suite version 1.2 or later. (2022-04-21, CVE-2022-27237)
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>