PAN-OS: Reflected Cross-Site Scripting (XSS) in Web Interface

A reflected cross-site scripting (XSS) vulnerability in the Palo Alto Network PAN-OS web interface enables an authenticated network-based attacker to mislead another authenticated PAN-OS administrator to click on a specially crafted link that performs arbitrary actions in the PAN-OS web interface as the targeted authenticated administrator.

Work around:
Enable signatures for Unique Threat IDs 91573, 91574, 91575, 91576 on traffic destined for the web interface to block attacks against CVE-2021-3052.

This issue requires the attacker to have authenticated access to the PAN-OS web interface. You can mitigate the impact of this issue by following best practices for securing the PAN-OS web interface. Please review the Best Practices for Securing Administrative Access in the PAN-OS technical documentation at https://docs.paloaltonetworks.com/best-practices.