How severe is CVE-2024-23664?

CVE-2024-23664 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-23664 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-23664?

CVE-2024-23664 primarily affects Fortinet Fortiauthenticator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-23664?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-23664 have an EU (EUVD) identifier?

Yes. CVE-2024-23664 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21137.

When was CVE-2024-23664 published?

CVE-2024-23664 was published on 2024-06-03 and last updated on 2026-06-17.

CVE-2024-23664

CVE-2024-23664 is a medium-severity vulnerability in Fortinet Fortiauthenticator with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-21137
Weakness: CWE-601
Affected product: Fortinet Fortiauthenticator
Published: 2024-06-03
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2024-23664?: CVE-2024-23664 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-23664 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-23664?: CVE-2024-23664 primarily affects Fortinet Fortiauthenticator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-23664?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-23664 have an EU (EUVD) identifier?: Yes. CVE-2024-23664 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21137.
When was CVE-2024-23664 published?: CVE-2024-23664 was published on 2024-06-03 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-23-465

Affected products (2)

cpe:2.3:a:fortinet:fortiauthenticator:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.0:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortiauthenticator

CVE-2026-44277 — Critical (CVSS 9.8): A improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0,…
CVE-2013-6990 — Critical (CVSS 9.0): FortiGuard FortiAuthenticator before 3.0 allows remote administrators to gain privileges via the command line interface.
CVE-2021-43067 — High (CVSS 8.3): A exposure of sensitive information to an unauthorized actor in Fortinet FortiAuthenticator version 6.4.0, version…
CVE-2021-22124 — High (CVSS 7.5): An uncontrolled resource consumption (denial of service) vulnerability in the login modules of FortiSandbox 3.2.0…
CVE-2015-1455 — High (CVSS 7.5): Fortinet FortiAuthenticator 3.0.0 has a password of (1) slony for the slony PostgreSQL user and (2) www-data for the…
CVE-2026-21743 — High (CVSS 7.2): A missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all…

All CVEs affecting Fortinet Fortiauthenticator →

Other CWE-601 (Open Redirect) vulnerabilities

CVE-2018-3774 — Critical (CVSS 10.0): Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open…
CVE-2019-25282 — Critical (CVSS 9.8): V-SOL GPON/EPON OLT Platform v2.03 contains an open redirect vulnerability in the script that allows attackers to…
CVE-2020-36912 — Critical (CVSS 9.8): Plexus anblick Digital Signage Management 3.1.13 contains an open redirect vulnerability in the 'PantallaLogin' script…
CVE-2025-43526 — Critical (CVSS 9.8): This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac…
CVE-2025-55031 — Critical (CVSS 9.8): Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An…
CVE-2024-22891 — Critical (CVSS 9.8): Nteract v.0.28.0 was discovered to contain a remote code execution (RCE) vulnerability via the Markdown link.

Browse all CWE-601 (Open Redirect) vulnerabilities →