Esoms Cross-site Scripting

For ABB eSOMS versions 4.0 to 6.0.2, the HTTPOnly flag is not set. This can allow Javascript to access the cookie contents, which in turn might enable Cross Site Scripting. (2020-04-02, CVE-2019-19003)

For ABB eSOMS versions 4.0 to 6.0.2, the X-XSS-Protection HTTP response header is not set in responses from the web server. For older web browser not supporting Content Security Policy, this might increase the risk of Cross Site Scripting. (2020-04-02, CVE-2019-19002)

Lack of adequate input/output validation for ABB eSOMS versions 4.0 to 6.0.2 might allow an attacker to attack such as stored cross-site scripting by storing malicious content in the database. (2020-04-02, CVE-2019-19095)

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>