CVE-2020-2005: PAN-OS: GlobalProtect Clientless VPN session hijacking

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-05-13 · updated 2026-06-17
Weakness: CWE-79

Description

A cross-site scripting (XSS) vulnerability exists when visiting malicious websites with the Palo Alto Networks GlobalProtect Clientless VPN that can compromise the user's active session. This issue affects: PAN-OS 7.1 versions earlier than 7.1.26; PAN-OS 8.1 versions earlier than 8.1.13; PAN-OS 9.0 versions earlier than 9.0.7; All versions of PAN-OS 8.0.

Affected products

Palo Alto Networks PAN-OS: from 7.1.0 before 7.1.26; from 8.0.0 through 8.0.20; from 8.1.0 before 8.1.13; from 9.0.0 before 9.0.7 — fixed in 7.1.26, 8.1.13, 9.0.7
Palo Alto Networks PAN-OS: from 7.1 before 7.1.26; from 8.1 before 8.1.13; from 9.0 before 9.0.7; 8.0.* — fixed in 7.1.26, 8.1.13, 9.0.7

How to fix

Upgrade to a fixed version: Palo Alto Networks PAN-OS 7.1.26, 8.1.13, 9.0.7; Palo Alto Networks PAN-OS 7.1.26, 8.1.13, 9.0.7. Check the vendor advisory for mitigations.

References

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