CVE-2025-52436 Cross-site scripting in FortiSandbox

What is CVE-2025-52436?

CVE-2025-52436 is a high-severity cross-site scripting vulnerability in Fortinet Fortisandbox, published on 10 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-79

Which versions are affected by CVE-2025-52436?

It affects 1 product.

Products include Fortinet Fortisandbox.

How do I fix CVE-2025-52436?

No fix has been published for CVE-2025-52436 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-52436 being exploited?

There is no known exploitation of CVE-2025-52436 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortisandbox

• CVE-2026-25089 Fortinet FortiSandbox OS Command Injection Exploited Critical 9.1
• CVE-2026-39808 Fortinet FortiSandbox OS Command Injection Exploited Critical 9.1
• CVE-2026-26083 Missing authorization in FortiSandbox Critical 9.1
• CVE-2026-39813 Path traversal in FortiSandbox Critical 9.1
• CVE-2020-29011 SQL injection in Fortinet FortiSandbox High 8.8

All Fortinet Fortisandbox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-chwm-wv7v-hv3q.