What is CVE-2024-23664?

CVE-2024-23664 is a medium-severity vulnerability in Fortinet Fortiauthenticator, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2024-06-03.

How severe is CVE-2024-23664?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in Fortinet Fortiauthenticator

CVE-2024-23664

A URL redirection to untrusted site ('open redirect') in Fortinet FortiAuthenticator version 6.6.0, version 6.5.3 and below, version 6.4.9 and below may allow an attacker to to redirect users to an arbitrary website via a crafted URL.

Vulnerability class: Open Redirect

Published 2024-06-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (26.8th percentile), scored 2026-10-21.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Fortinet Fortiauthenticator — versions 6.6.0, 6.5.0, 6.4.0

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

fortiguard.fortinet.com/psirt/FG-IR-23-465 (Vendor Advisory)

Frequently asked questions

What is CVE-2024-23664?: CVE-2024-23664 is a medium-severity vulnerability in Fortinet Fortiauthenticator, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2024-06-03.
How severe is CVE-2024-23664?: Medium severity. CVSS v3 base score is 6.1 out of 10.