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Cross-site Scripting occurrences in E-commerce
An authenticated attacker in SAP E-Commerce (Business-to-Consumer application), versions 7.3, 7.31, 7.32, 7.33, 7.54, can change the price of the product to zero and also checkout, by injecting an HTML code in the application that will be executed whenever the victim logs in to the application even on a different machine, leading to Code Injection. (2019-06-12, CVE-2019-0308)
SAP E-Commerce (Business-to-Consumer) application does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability. Fixed in the following components SAP-CRMJAV SAP-CRMWEB SAP-SHRWEB SAP-SHRJAV SAP-CRMAPP SAP-SHRAPP, versions 7.30, 7.31, 7.32, 7.33, 7.54. (2019-05-14, CVE-2019-0298)
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>