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, FortiSandbox 4.0 all versions may allow an unauthenticated attacker to execute commands via crafted requests.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.073 (94.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-52436: rose from 0.065 to 0.073.

EPSS over last 30 days · oldest: 0.065 · newest: 0.073 · change: +0.008

Affected products

Weakness classification (CWE)

References

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: 8.8/10. Published 2026-02-10.
How severe is CVE-2025-52436?
High severity. CVSS v3 base score is 8.8 out of 10.