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Cross-site Scripting occurrences in Data Science For Aws
The application server component of TIBCO Software Inc.'s TIBCO Data Science for AWS, and TIBCO Spotfire Data Science contains a persistent cross-site scripting vulnerability that theoretically allows an authenticated user to gain access to all the capabilities of the web interface available to more privileged users. Affected releases are TIBCO Software Inc.'s TIBCO Data Science for AWS: versions up to and including 6.4.0, and TIBCO Spotfire Data Science: versions up to and including 6.4.0. (2019-03-26, CVE-2019-8987)
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>