How severe is CVE-2023-22637?

CVE-2023-22637 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-22637 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22637?

CVE-2023-22637 primarily affects Fortinet Fortinac. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-22637?

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

When was CVE-2023-22637 published?

CVE-2023-22637 was published on 2023-05-03 and last updated on 2026-06-17.

CVE-2023-22637

CVE-2023-22637 is a medium-severity vulnerability in Fortinet Fortinac with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fortinet Fortinac
Published: 2023-05-03
Last modified: 2026-06-17

Description

An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiNAC-F version 7.2.0, FortiNAC version 9.4.2 and below, 9.2 all versions, 9.1 all versions, 8.8 all versions, 8.7 all versions in License Management would permit an authenticated attacker to trigger remote code execution via crafted licenses.

Frequently asked questions

What is CVE-2023-22637?: An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiNAC-F version 7.2.0, FortiNAC version 9.4.2 and below, 9.2 all versions, 9.1 all versions, 8.8 all versions, 8.7 all versions in License Management would permit an authenticated attacker to trigger remote code execution via crafted licenses.
How severe is CVE-2023-22637?: CVE-2023-22637 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-22637 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22637?: CVE-2023-22637 primarily affects Fortinet Fortinac. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-22637?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-22637 published?: CVE-2023-22637 was published on 2023-05-03 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-23-013

Affected products (2)

cpe:2.3:a:fortinet:fortinac:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac-f:7.2.0:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortinac

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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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