JavaScript pre-processing can be used by the attacker to gain access to the file system (read-only access on behalf of user "zabbix") on the Zabbix Server or Zabbix Proxy, potentially leading to unauthorized access to sensitive data.
https://support.zabbix.com/browse/ZBX-22588
https://lists.debian.org/debian-lts-announce/2023/08/msg00027.html