CVE-2021-22122 Cross-site scripting in Fortinet FortiWeb

What is CVE-2021-22122?

CVE-2021-22122 is a medium-severity cross-site scripting vulnerability in Fortinet Fortiweb, published on 8 Feb 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2021-22122?

It affects 1 product.

Products include Fortinet Fortiweb.

How do I fix CVE-2021-22122?

No fix has been published for CVE-2021-22122 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-22122 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-22122 exists.

Public exploit code: 1 Nuclei template.

Other vulnerabilities in Fortinet Fortiweb

• CVE-2025-25257 Fortinet FortiWeb SQL Injection Exploited Critical 9.6
• CVE-2025-64446 Fortinet FortiWeb Path Traversal Exploited Critical 9.4
• CVE-2025-58034 Fortinet FortiWeb OS Command Injection Exploited Medium 6.7
• CVE-2020-29015 SQL injection in Fortinet FortiWeb Critical 9.8
• CVE-2020-29016 Memory corruption in Fortinet FortiWeb Critical 9.8

All Fortinet Fortiweb vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-6xx4-8wj3-477v.