This article is a part of our Vulnerability Database (back to index)
Cross-site Scripting occurrences in Data Master
Cross-site scripting in File Explorer in ASUSTOR ADM version 3.1.1 allows attackers to execute JavaScript by uploading SVG images with embedded JavaScript. (2018-12-04, CVE-2018-12305)
ASUSTOR Data Master 3.1.5 and below makes an HTTP request for a configuration file that is vulnerable to XSS. A man in the middle can take advantage of this by inserting Javascript into the configuration files Version field. (2018-08-27, CVE-2018-15699)
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>