CVE-2022-23438

Name: CVE-2022-23438
Creator: NVD / NIST
Published: 2022-07-18T18:15:08.963+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2022-23438 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. An improper neutralization of input during web page generation ('Cross-site Scripting') [CWE-79] vulnerability in FortiOS version 7.0.5 and prior and 6.4.9 and prior may allow an unauthenticated remote attacker to perform a reflected cross site scripting (XSS) attack in the captive portal authentication replacement page.. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

An improper neutralization of input during web page generation ('Cross-site Scripting') [CWE-79] vulnerability in FortiOS version 7.0.5 and prior and 6.4.9 and prior may allow an unauthenticated remote attacker to perform a reflected cross site scripting (XSS) attack in the captive portal authentication replacement page.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.53%

40.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Fortinet	Fortios	<= 6.4.9
Fortinet	Fortios	>= 7.0.0, <= 7.0.5

References

https://fortiguard.com/psirt/FG-IR-21-057Broken Link, Vendor Advisory
https://fortiguard.com/psirt/FG-IR-21-057Broken Link, Vendor Advisory

Timeline

Published: Jul 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-23438?

How severe is CVE-2022-23438?

CVE-2022-23438 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2022-23438?

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-2022-23438?

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

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Source: NVD / NIST