How severe is CVE-2023-22638?

CVE-2023-22638 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-22638 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22638?

CVE-2023-22638 primarily affects Fortinet Fortinac. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-22638?

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.

When was CVE-2023-22638 published?

CVE-2023-22638 was published on 2023-02-16 and last updated on 2026-06-17.

CVE-2023-22638

CVE-2023-22638 is a high-severity vulnerability in Fortinet Fortinac with a CVSS 3.x base score of 7.1. 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-79.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fortinet Fortinac
Published: 2023-02-16
Last modified: 2026-06-17

Description

Several improper neutralization of inputs during web page generation vulnerability [CWE-79] in FortiNAC 9.4.1 and below, 9.2.6 and below, 9.1.8 and below, 8.8.11 and below, 8.7.6 and below, 8.6.5 and below, 8.5.4 and below, 8.3.7 and below may allow an authenticated attacker to perform several XSS attacks via crafted HTTP GET requests.

Frequently asked questions

What is CVE-2023-22638?: Several improper neutralization of inputs during web page generation vulnerability [CWE-79] in FortiNAC 9.4.1 and below, 9.2.6 and below, 9.1.8 and below, 8.8.11 and below, 8.7.6 and below, 8.6.5 and below, 8.5.4 and below, 8.3.7 and below may allow an authenticated attacker to perform several XSS attacks via crafted HTTP GET requests.
How severe is CVE-2023-22638?: CVE-2023-22638 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-22638 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22638?: CVE-2023-22638 primarily affects Fortinet Fortinac. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-22638?: 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.
When was CVE-2023-22638 published?: CVE-2023-22638 was published on 2023-02-16 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-22-260

Affected products (4)

cpe:2.3:a:fortinet:fortinac:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac:8.3.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac:9.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac:9.4.1:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortinac

CVE-2023-33299 — Critical (CVSS 9.8): A deserialization of untrusted data in Fortinet FortiNAC below 7.2.1, below 9.4.3, below 9.2.8 and all earlier versions…
CVE-2022-39952 — Critical (CVSS 9.8): A external control of file name or path in Fortinet FortiNAC versions 9.4.0, 9.2.0 through 9.2.5, 9.1.0 through 9.1.7,…
CVE-2022-38375 — Critical (CVSS 9.1): An improper authorization vulnerability [CWE-285] in Fortinet FortiNAC version 9.4.0 through 9.4.1 and before 9.2.6…
CVE-2022-26117 — High (CVSS 8.8): An empty password in configuration file vulnerability [CWE-258] in FortiNAC version 8.3.7 and below, 8.5.2 and below,…
CVE-2022-39953 — High (CVSS 7.8): A improper privilege management in Fortinet FortiNAC version 9.4.0 through 9.4.1, FortiNAC version 9.2.0 through 9.2.6,…
CVE-2021-43065 — High (CVSS 7.8): A incorrect permission assignment for critical resource in Fortinet FortiNAC version 9.2.0, version 9.1.3 and below,…

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