CVE-2023-33302 Memory corruption in FortiMail

What is CVE-2023-33302?

CVE-2023-33302 is a medium-severity memory corruption vulnerability in Fortinet FortiMail, published on 31 Mar 2025. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A buffer copy without checking size of input ('classic buffer overflow') in Fortinet FortiMail webmail and administrative interface version 6.4.0 through 6.4.4 and before 6.2.6 and FortiNDR administrative interface version 7.2.0 and before 7.1.0 allows an authenticated attacker with regular webmail access to trigger a buffer overflow and to possibly execute unauthorized code or commands via specifically crafted HTTP requests.

Weakness: CWE-120

Which versions are affected by CVE-2023-33302?

It affects 2 products.

Products include Fortinet Fortimail, Fortinet Fortindr.

How do I fix CVE-2023-33302?

No fix has been published for CVE-2023-33302 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-33302 being exploited?

There is no known exploitation of CVE-2023-33302 in the wild and no public exploit code.

Other vulnerabilities in Fortinet FortiMail

• CVE-2026-104286 Fortinet FortiMail Path Traversal Exploited Critical 9.8
• CVE-2021-36166 Auth bypass in Fortinet FortiMail Critical 9.8
• CVE-2021-24007 SQL injection in Fortinet FortiMail Critical 9.8
• CVE-2020-9294 Auth bypass in FortiMail Critical 9.8
• CVE-2023-47539 Auth bypass in FortiMail Critical 9.0

Sources

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

Also known as GHSA-3rq3-6pw2-f97f.