What is CVE-2025-52436?

CVE-2025-52436 is a high-severity vulnerability in Fortinet Fortisandbox, classified under Cross-site Scripting. CVSS score: 7.9/10. Published 2026-02-10.

How severe is CVE-2025-52436?

High severity. CVSS v3 base score is 7.9 out of 10.

XSS in Fortinet Fortisandbox

CVE-2025-52436

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.7, FortiSandbox 4.2 all versions, For…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (54.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C.

Affected products

Fortinet Fortisandbox — versions 5.0.0, 4.4.0, 4.2.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-093

Frequently asked questions

What is CVE-2025-52436?: CVE-2025-52436 is a high-severity vulnerability in Fortinet Fortisandbox, classified under Cross-site Scripting. CVSS score: 7.9/10. Published 2026-02-10.
How severe is CVE-2025-52436?: High severity. CVSS v3 base score is 7.9 out of 10.