CVE-2021-41015 Cross-site scripting in Fortinet FortiWeb

What is CVE-2021-41015?

CVE-2021-41015 is a medium-severity cross-site scripting vulnerability in Fortinet Fortiweb, published on 8 Dec 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

A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows attacker to execute unauthorized code or commands via crafted HTTP requests to SAML login handler

Weakness: CWE-79

Which versions are affected by CVE-2021-41015?

It affects 1 product.

Products include Fortinet Fortiweb.

How do I fix CVE-2021-41015?

No fix has been published for CVE-2021-41015 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-2021-41015 being exploited?

There is no known exploitation of CVE-2021-41015 in the wild and no public exploit code.

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-442w-3vhj-m8rc.