The earliest recollection of this bug is traced back to PAN-OS 8.1.6 - January 09, 2024. This bug is fixed in PAN-OS versions 8.1.6. A security-related fix was made to prevent cross-site scripting (XSS) attacks through the PAN-OS Management Web Interface (CVE-2019-1566). For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-6-addressed-issues