CVE-2021-3052 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.
This issue impacts:
PAN-OS 8.1 versions earlier than 8.1.20;
PAN-OS 9.0 versions earlier than 9.0.14;
PAN-OS 9.1 versions earlier than 9.1.10;
PAN-OS 10.0 versions earlier than 10.0.2.
This issue does not affect Prisma Access.
|PAN-OS 10.0||< 10.0.2||>= 10.0.2|
|PAN-OS 9.1||< 9.1.10||>= 9.1.10|
|PAN-OS 9.0||< 9.0.14||>= 9.0.14|
|PAN-OS 8.1||< 8.1.20||>= 8.1.20|
CVSSv3.1 Base Score: 8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H)
Palo Alto Networks is not aware of any malicious attempts to exploit this vulnerability.
This issue is fixed in PAN-OS 9.0.14, PAN-OS 8.1.20, PAN-OS 9.1.10, PAN-OS 10.0.2, PAN-OS 10.1.0, and all later PAN-OS versions.
Workarounds and Mitigations
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.