What is CVE-2025-53608?

CVE-2025-53608 is a medium-severity vulnerability in Fortinet Fortisandbox, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2026-03-10.

How severe is CVE-2025-53608?

Medium severity. CVSS v3 base score is 4.6 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, For…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (15.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:P/RL:X/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-26-091

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: 4.6/10. Published 2026-03-10.
How severe is CVE-2025-53608?: Medium severity. CVSS v3 base score is 4.6 out of 10.