Reflected XSS attacks, occur when a malicious script is reflected off a web application to the victim's browser. The script can be activated through Action form fields, which can be sent as request to a website with a vulnerability that enables execution of malicious scripts.
https://support.zabbix.com/browse/ZBX-22988
https://lists.debian.org/debian-lts-announce/2023/08/msg00027.html