CVE-2020-26693

Name: CVE-2020-26693
Creator: NVD / NIST
Published: 2021-06-01T15:15:07.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 5.31%

Last modified Jun 17, 2026

CVE-2020-26693 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A stored cross-site scripting (XSS) vulnerability was discovered in pfSense 2.4.5-p1 which allows an authenticated attacker to execute arbitrary web scripts via exploitation of the load_balancer_monitor.php function.. EPSS estimates a 5.31% chance of exploitation in the next 30 days.

Description

A stored cross-site scripting (XSS) vulnerability was discovered in pfSense 2.4.5-p1 which allows an authenticated attacker to execute arbitrary web scripts via exploitation of the load_balancer_monitor.php function.

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

5.31%

91.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Pfsense	Pfsense	2.4.5	P1

References

https://github.com/pfsense/pfsense/commit/a220a22a8c05c10a7b875ac6b565f2c4fe7b251cPatch, Third Party Advisory
https://github.com/pfsense/pfsense/commit/a220a22a8c05c10a7b875ac6b565f2c4fe7b251cPatch, Third Party Advisory

Timeline

Published: Jun 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26693?

How severe is CVE-2020-26693?

CVE-2020-26693 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 5.31% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26693?

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-2020-26693?

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

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Source: NVD / NIST