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Cross-site Scripting occurrences in Opcenter Execution Core
A vulnerability has been identified in Camstar Enterprise Platform (All versions), Opcenter Execution Core (All versions < V8.2), Opcenter Execution Core (V8.2). An authenticated user with the ability to create containers, packages or register defects could perform stored Cross-Site Scripting (XSS) attacks within the vulnerable software. The impact of this attack could result in the session cookies of legitimate users being stolen. Should the attacker gain access to these cookies, they could then hijack the session and perform arbitrary actions in the name of the victim. (2020-07-14, CVE-2020-7576)
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>