CVE-2021-43064 Open redirect in Fortinet FortiWeb

What is CVE-2021-43064?

CVE-2021-43064 is a medium-severity vulnerability in Fortinet Fortiweb, published on 8 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A url redirection to untrusted site ('open redirect') in Fortinet FortiWeb version 6.4.1 and 6.4.0, version 6.3.15 and below, version 6.2.6 and below allows attacker to use the device as a proxy and reach external or protected hosts via redirection handlers.

Weakness: CWE-601

Which versions are affected by CVE-2021-43064?

It affects 1 product.

Products include Fortinet Fortiweb.

How do I fix CVE-2021-43064?

No fix has been published for CVE-2021-43064 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-43064 being exploited?

There is no known exploitation of CVE-2021-43064 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-56m9-2h59-x23m.