CVE-2020-19203

Name: CVE-2020-19203
Creator: NVD / NIST
Published: 2021-07-12T16:15:08.413+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.05%

Last modified Jun 17, 2026

CVE-2020-19203 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An authenticated Cross-Site Scripting (XSS) vulnerability was found in widgets/widgets/wake_on_lan_widget.php, a component of the pfSense software WebGUI, on version 2.4.4-p2 and earlier. The widget did not encode the descr (description) parameter of wake-on-LAN entries in its output, leading to a possible stored XSS.. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

Description

An authenticated Cross-Site Scripting (XSS) vulnerability was found in widgets/widgets/wake_on_lan_widget.php, a component of the pfSense software WebGUI, on version 2.4.4-p2 and earlier. The widget did not encode the descr (description) parameter of wake-on-LAN entries in its output, leading to a possible stored XSS.

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

1.05%

59.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Netgate	Pfsense	< 2.4.4
Netgate	Pfsense	2.4.4

References

https://docs.netgate.com/pfsense/en/latest/releases/2-4-4-p3.htmlVendor Advisory
https://gist.github.com/dharmeshbaskaran/55d546496bfb0ba28117e846d8b785dbThird Party Advisory
https://www.netgate.com/assets/downloads/advisories/pfSense-SA-19_04.webgui.ascVendor Advisory
https://www.pfsense.org/download/Product, Release Notes, Vendor Advisory
https://docs.netgate.com/pfsense/en/latest/releases/2-4-4-p3.htmlVendor Advisory
https://gist.github.com/dharmeshbaskaran/55d546496bfb0ba28117e846d8b785dbThird Party Advisory
https://www.netgate.com/assets/downloads/advisories/pfSense-SA-19_04.webgui.ascVendor Advisory
https://www.pfsense.org/download/Product, Release Notes, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2020-19203?

How severe is CVE-2020-19203?

CVE-2020-19203 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2020-19203?

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-2020-19203?

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

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Source: NVD / NIST