CVE-2025-59923 Missing authorization in FortiAuthenticator

What is CVE-2025-59923?

CVE-2025-59923 is a low-severity missing authorization vulnerability in Fortinet FortiAuthenticator, published on 9 Dec 2025. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

An improper access control vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow an authenticated attacker with at least read-only admin permission to obtain the credentials of other administrators' messaging services via crafted requests.

Weakness: CWE-284

Which versions are affected by CVE-2025-59923?

It affects 1 product.

Products include Fortinet Fortiauthenticator.

How do I fix CVE-2025-59923?

No fix has been published for CVE-2025-59923 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-2025-59923 being exploited?

There is no known exploitation of CVE-2025-59923 in the wild and no public exploit code.

Other vulnerabilities in Fortinet FortiAuthenticator

• CVE-2026-44277 Missing authorization in FortiAuthenticator Critical 9.1
• CVE-2013-6990 Privilege escalation in n/a Critical 9.0
• CVE-2021-43067 Information disclosure in Fortinet FortiAuthenticator High 8.3
• CVE-2021-22124 Denial of service in Fortinet FortiSandbox, FortiAuthenticator High 7.5
• CVE-2015-1455 Hardcoded credentials in n/a High 7.5

Sources

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

Also known as GHSA-g43v-3rf4-64c9.