How severe is CVE-2024-23663?

CVE-2024-23663 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-23663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-23663?

CVE-2024-23663 primarily affects Fortinet Fortiextender Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-23663?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-23663 have an EU (EUVD) identifier?

Yes. CVE-2024-23663 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21136.

When was CVE-2024-23663 published?

CVE-2024-23663 was published on 2024-07-09 and last updated on 2026-06-17.

CVE-2024-23663

CVE-2024-23663 is a high-severity vulnerability in Fortinet Fortiextender Firmware with a CVSS 3.x base score of 8.8. 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-284.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-21136
Weakness: CWE-284
Affected product: Fortinet Fortiextender Firmware
Published: 2024-07-09
Last modified: 2026-06-17

Description

An improper access control in Fortinet FortiExtender 4.1.1 - 4.1.9, 4.2.0 - 4.2.6, 5.3.2, 7.0.0 - 7.0.4, 7.2.0 - 7.2.4 and 7.4.0 - 7.4.2 allows an attacker to create users with elevated privileges via a crafted HTTP request.

Frequently asked questions

What is CVE-2024-23663?: An improper access control in Fortinet FortiExtender 4.1.1 - 4.1.9, 4.2.0 - 4.2.6, 5.3.2, 7.0.0 - 7.0.4, 7.2.0 - 7.2.4 and 7.4.0 - 7.4.2 allows an attacker to create users with elevated privileges via a crafted HTTP request.
How severe is CVE-2024-23663?: CVE-2024-23663 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-23663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-23663?: CVE-2024-23663 primarily affects Fortinet Fortiextender Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-23663?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-23663 have an EU (EUVD) identifier?: Yes. CVE-2024-23663 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21136.
When was CVE-2024-23663 published?: CVE-2024-23663 was published on 2024-07-09 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-23-459

Affected products (2)

cpe:2.3:o:fortinet:fortiextender_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fortinet:fortiextender_firmware:5.3.2:*:*:*:*:*:*:*

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