Due to insufficient input validation, SAP CRM WebClient UI allows an unauthenticated attacker to craft a URL link which embeds a malicious script. When a victim clicks on this link, the script will be executed in the victim's browser giving the attacker the ability to access and/or modify information with no effect on availability of the application.
https://support.sap.com/en/my-support/knowledge-base/security-notes-news.html