Domino Cross-site Scripting

HCL iNotes is susceptible to a Reflected Cross-site Scripting (XSS) vulnerability caused by improper validation of user-supplied input supplied with a form POST request. A remote attacker could exploit this vulnerability using a specially-crafted URL to execute script in a victim's web browser within the security context of the hosting web site and/or steal the victim's cookie-based authentication credentials. (2022-08-29, CVE-2022-27546)

HCL Verse v10 and v11 is susceptible to a Stored Cross-Site Scripting (XSS) vulnerability due to improper handling of message content. An unauthenticated remote attacker could exploit this vulnerability using specially-crafted markup to execute script in a victim's web browser within the security context of the hosting Web site and/or steal the victim's cookie-based authentication credentials. (2020-12-18, CVE-2020-4080)

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>