This article is a part of our Vulnerability Database (back to index)
Cross-site Scripting occurrences in Sage Dpw
An issue was discovered in Sage DPW 2020_06_x before 2020_06_002. The search field "Kurs suchen" on the page Kurskatalog is vulnerable to Reflected XSS. If the attacker can lure a user into clicking a crafted link, he can execute arbitrary JavaScript code in the user's browser. The vulnerability can be used to change the contents of the displayed site, redirect to other sites, or steal user credentials. Additionally, users are potential victims of browser exploits and JavaScript malware. (2020-10-16, CVE-2020-26584)
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>