CVE-2023-36556 Missing authorization in FortiMail

What is CVE-2023-36556?

CVE-2023-36556 is a high-severity missing authorization vulnerability in Fortinet FortiMail, published on 10 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An incorrect authorization vulnerability [CWE-863] in FortiMail webmail version 7.2.0 through 7.2.2, version 7.0.0 through 7.0.5 and below 6.4.7 allows an authenticated attacker to login on other users accounts from the same web domain via crafted HTTP or HTTPs requests.

Weakness: CWE-863

Which versions are affected by CVE-2023-36556?

It affects 1 product.

Products include Fortinet Fortimail.

How do I fix CVE-2023-36556?

No fix has been published for CVE-2023-36556 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-36556 being exploited?

There is no known exploitation of CVE-2023-36556 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-j5v9-j38h-gcff.