What is CVE-2023-22638?

CVE-2023-22638 is a high-severity vulnerability in Fortinet Fortinac, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2023-02-16.

How severe is CVE-2023-22638?

High severity. CVSS v3 base score is 7.1 out of 10.

XSS in Fortinet Fortinac

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-02-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Fortinet Fortinac — versions 9.4.1, 8.8.0, 8.5.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

fortiguard.com/psirt/FG-IR-22-260 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-22638?: CVE-2023-22638 is a high-severity vulnerability in Fortinet Fortinac, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2023-02-16.
How severe is CVE-2023-22638?: High severity. CVSS v3 base score is 7.1 out of 10.