---
id: CVE-2025-61886
title: >-
  An Improper Neutralization of Input During Web Page Generation ('Cross-site
  Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox
  5.0.0 through 5.0.4, FortiSandbox PaaS 5.0.0 through 5.0.4 may allow an
  attacker to per…
summary: >-
  An Improper Neutralization of Input During Web Page Generation ('Cross-site
  Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox
  5.0.0 through 5.0.4, FortiSandbox PaaS 5.0.0 through 5.0.4 may allow an
  attacker to per…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: fortinet
product: fortisandbox
affected:
  - 'fortisandbox >= 5.0.0, < 5.0.5'
  - fortisandbox_cloud = 5.0.4
patched:
  - fortisandbox 5.0.5
published: '2026-04-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-61886'
references:
  - url: 'https://fortiguard.fortinet.com/psirt/FG-IR-26-109'
    label: psirt@fortinet.com
tags:
  - nvd
epss: 0.00275
epssPercentile: 0.18417
ingestedAt: '2026-10-14T13:30:58.479Z'
---

## Overview

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.4, FortiSandbox PaaS 5.0.0 through 5.0.4 may allow an attacker to perform an XSS attack via crafted HTTP requests.

## Affected

- `fortisandbox >= 5.0.0, < 5.0.5`
- `fortisandbox_cloud = 5.0.4`

## Remediation

Upgrade past the affected range:

- `fortisandbox 5.0.5`