Froxlor Cross-site Scripting

Code Injection in GitHub repository froxlor/froxlor prior to 0.10.38.2. (2022-11-05, CVE-2022-3869)

Code Injection in GitHub repository froxlor/froxlor prior to 0.10.39. (2022-11-04, CVE-2022-3721)

Froxlor through 0.10.22 does not perform validation on user input passed in the customermail GET parameter. The value of this parameter is reflected in the login webpage, allowing the injection of arbitrary HTML tags. (2022-04-13, CVE-2020-29653)

Multiple cross-site scripting (XSS) vulnerabilities in the Customer Add module of Foxlor v0.10.16 allows attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the name, firstname, or username input fields. (2021-10-22, CVE-2020-28957)

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>