CVE-2025-54353 Cross-site scripting in FortiSandbox
An attacker can execute arbitrary scripts in the victim's browser via crafted HTTP requests in FortiSandbox, potentially bypassing security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-54353?
CVE-2025-54353 is a medium-severity cross-site scripting vulnerability in Fortinet Fortisandbox, published on 9 Dec 2025. 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 5.0.2, FortiSandbox 4.4.0 through 4.4.7, FortiSandbox 4.2 all versions, FortiSandbox 4.0 all versions may allow an attacker to perform an XSS attack via crafted HTTP requests.
Weakness: CWE-79
Which versions are affected by CVE-2025-54353?
It affects 1 product.
Products include Fortinet Fortisandbox.
How do I fix CVE-2025-54353?
No fix has been published for CVE-2025-54353 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-2025-54353 being exploited?
There is no known exploitation of CVE-2025-54353 in the wild and no public exploit code.
Other vulnerabilities in Fortinet Fortisandbox
Sources
Also known as GHSA-xwrg-6m45-8r48.