CVE-2020-19201

Name: CVE-2020-19201
Creator: NVD / NIST
Published: 2021-07-12T16:15:08.367+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 3.45%

Last modified Jun 17, 2026

CVE-2020-19201 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A Stored Cross-Site Scripting (XSS) vulnerability was found in status_filter_reload.php, a page in the pfSense software WebGUI, on Netgate pfSense version 2.4.4-p2 and earlier. The page did not encode output from the filter reload process, and a stored XSS was possible via the descr (description) parameter on NAT rules.. EPSS estimates a 3.45% chance of exploitation in the next 30 days.

Description

A Stored Cross-Site Scripting (XSS) vulnerability was found in status_filter_reload.php, a page in the pfSense software WebGUI, on Netgate pfSense version 2.4.4-p2 and earlier. The page did not encode output from the filter reload process, and a stored XSS was possible via the descr (description) parameter on NAT rules.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

3.45%

87.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Netgate	Pfsense	<= 2.4.4	—
Netgate	Pfsense	2.4.4	P1

References

https://docs.netgate.com/pfsense/en/latest/releases/2-4-4-p3.htmlProduct, Vendor Advisory
https://gist.github.com/dharmeshbaskaran/fd3779006361d07651a883e8a040d916Exploit, Third Party Advisory
https://www.pfsense.org/download/Vendor Advisory
https://docs.netgate.com/pfsense/en/latest/releases/2-4-4-p3.htmlProduct, Vendor Advisory
https://gist.github.com/dharmeshbaskaran/fd3779006361d07651a883e8a040d916Exploit, Third Party Advisory
https://www.pfsense.org/download/Vendor Advisory

Timeline

Published: Jul 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-19201?

How severe is CVE-2020-19201?

CVE-2020-19201 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 3.45% probability of exploitation in the next 30 days.

How do I fix CVE-2020-19201?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-19201?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST