What is CVE-2025-53608?

CVE-2025-53608 is a medium-severity vulnerability in Fortinet Fortisandbox, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-03-10.

How severe is CVE-2025-53608?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Fortinet Fortisandbox

CVE-2025-53608

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.0 through 4.4.7, FortiSandbox 4.2 all versions, FortiSandbox 4.0 all versions may allow an authenticated privileged attacker to execute code via crafted requests.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (22.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Fortinet Fortisandbox — versions 5.0.0, 4.4.0, 4.2.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

psirt@fortinet.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-53608?: CVE-2025-53608 is a medium-severity vulnerability in Fortinet Fortisandbox, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-03-10.
How severe is CVE-2025-53608?: Medium severity. CVSS v3 base score is 4.8 out of 10.