PAN-OS: Reflected Cross-Site Scripting (XSS) vulnerability in management web interface

published 2020-09-09 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-22062

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 23.9%; EPSS 23.9% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known, plus a Nuclei check

A reflected cross-site scripting (XSS) vulnerability exists in the PAN-OS management web interface. A remote attacker able to convince an administrator with an active authenticated session on the firewall management interface to click on a crafted link to that management web interface could potentially execute arbitrary JavaScript code in the administrator's browser and perform administrative actions. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.16; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9.

Patch / fix

fixed in 1

Palo Alto Networks PAN-OS 8.1.16, 9.0.9

Exploit prediction

23.89% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Nuclei template Palo Alto Networks PAN-OS Web Interface - Cross Site-Scripting nuclei detection template

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Palo Alto Networks PAN-OS

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

Palo Alto PAN-OS rss critical rss

References

security.paloaltonetworks.com /CVE-2020-2036
vendor-advisory

Sources

CVE List CVE-2020-2036
NVD CVE-2020-2036

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary