CVE-2025-52436CWE-79

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox 5.0.0…

High · published February 10, 2026

CVSS v3.1
7.9
EPSS
7%
Percentile
94.4
In the wild
Unconfirmed
What it is

⚡ A crafty request can turn into a security nightmare! Fortinet FortiSandbox versions 5.0.0 through 5.0.1 and earlier allow unauthenticated attackers to execute commands with ease. 🔥 This vulnerability is like a restaurant where anyone can place an order without verifying their identity — a malicious diner could request a dish that causes chaos in the kitchen. If the server doesn’t double-check the orders, the entire restaurant might end up serving food that wasn’t supposed to be on the menu! An attacker could exploit this vulnerability to inject and execute malicious scripts, gaining unauthorized access to sensitive data or even taking control of systems. This could lead to devastating consequences, such as data breaches and compromised network security, all while flying under the radar!

Put simply

This vulnerability is like a restaurant where anyone can place an order without verifying their identity — a malicious diner could request a dish that causes chaos in the kitchen. If the server doesn’t double-check the orders, the entire restaurant might end up serving food that wasn’t supposed to be on the menu! This XSS vulnerability arises from improper input neutralization during web page generation, allowing attackers to execute commands through crafted requests without any authentication required.

What to do

An attacker could exploit this vulnerability to inject and execute malicious scripts, gaining unauthorized access to sensitive data or even taking control of systems. This could lead to devastating consequences, such as data breaches and compromised network security, all while flying under the radar! To remediate, patch Fortinet FortiSandbox to the latest version immediately. Review your input validation processes and ensure that user inputs are properly sanitized to mitigate the risk of XSS. Additionally, implement a content security policy to add another layer of defense. You've got this! Follow these steps, and you'll fortify your defenses in no time. 🛡️

The record
Technical detail
CVSS v3.1
7.9 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.07307 · 94.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-10T15:39Z
EPSS history
Timeline
  • 10 FEB 15:39Z
    An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox 5.0.0…
    cvelistv5