CVE-2022-40683 Use after free in FortiWeb

What is CVE-2022-40683?

CVE-2022-40683 is a high-severity use after free vulnerability in Fortinet Fortiweb, published on 16 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A double free in Fortinet FortiWeb version 7.0.0 through 7.0.3 may allows attacker to execute unauthorized code or commands via specially crafted commands

Weakness: CWE-415

Which versions are affected by CVE-2022-40683?

It affects 1 product.

Products include Fortinet Fortiweb.

How do I fix CVE-2022-40683?

No fix has been published for CVE-2022-40683 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2022-40683 being exploited?

There is no known exploitation of CVE-2022-40683 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-g55x-g3rw-j988.