Cross-site scripting (XSS) vulnerability in the Push-Service-Mails feature in AVM FRITZ!OS before 6.30 allows remote attackers to inject arbitrary web script or HTML via the display name in the FROM field of an SIP INVITE message.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.