Emc Data Protection Advisor Cross-site Scripting

Dell EMC Data Protection Advisor versions 19.6 and earlier, contains a Stored Cross Site Scripting, an attacker could potentially exploit this vulnerability, leading to the storage of malicious HTML or JavaScript codes in a trusted application data store. When a victim user accesses the data store through their browsers, the malicious code gets executed by the web browser in the context of the vulnerable web application. Exploitation may lead to information disclosure, session theft, or client-side request forgery. (2022-08-30, CVE-2022-33935)

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>