CVE-2021-22122

Name: CVE-2021-22122
Creator: NVD / NIST
Published: 2021-02-08T16:15:12.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 10.52%

Last modified Jun 17, 2026

CVE-2021-22122 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. An improper neutralization of input during web page generation in FortiWeb GUI interface 6.3.0 through 6.3.7 and version before 6.2.4 may allow an unauthenticated, remote attacker to perform a reflected cross site scripting attack (XSS) by injecting malicious payload in different vulnerable API end-points.. EPSS estimates a 10.52% chance of exploitation in the next 30 days.

Description

An improper neutralization of input during web page generation in FortiWeb GUI interface 6.3.0 through 6.3.7 and version before 6.2.4 may allow an unauthenticated, remote attacker to perform a reflected cross site scripting attack (XSS) by injecting malicious payload in different vulnerable API end-points.

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

10.52%

95.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Fortinet	Fortiweb	<= 6.2.3
Fortinet	Fortiweb	>= 6.3.0, <= 6.3.7

References

https://fortiguard.com/advisory/FG-IR-20-122Vendor Advisory
https://fortiguard.com/advisory/FG-IR-20-122Vendor Advisory

Timeline

Published: Feb 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22122?

How severe is CVE-2021-22122?

CVE-2021-22122 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 10.52% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22122?

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-2021-22122?

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

Scan your code now

Source: NVD / NIST