CVE-2025-31366
Modified Modified - Updated After Analysis
BaseFortify

Publication date: 2025-10-14

Last updated on: 2026-06-09

Assigner: Fortinet, Inc.

Description
An Improper Neutralization of Input During Web Page Generation vulnerability [CWE-79] in FortiOS 7.6.0 through 7.6.3, 7.4.0 through 7.4.7, 7.2 all versions, 7.0 all versions, 6.4 all versions; FortiProxy 7.6.0 through 7.6.3, 7.4.0 through 7.4.9, 7.2 all versions, 7.0 all versions; FortiSASE 25.3.a may allow an unauthenticated attacker to perform a reflected cross site scripting (XSS) via crafted HTTP requests.
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Meta Information
Published
2025-10-14
Last Modified
2026-06-09
Generated
2026-06-16
AI Q&A
2025-10-14
EPSS Evaluated
2026-06-14
NVD
CVE-2025-31366
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
fortinet fortios From 7.4.0 (inc) to 7.4.9 (inc)
fortinet fortios From 7.4.0 (inc) to 7.4.9 (inc)
fortinet fortiproxy From 7.6.0 (inc) to 7.6.4 (inc)
fortinet fortisase 25.3.40
fortinet fortisase 25.3.40
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is an Improper Neutralization of Input During Web Page Generation (CWE-79) found in multiple versions of FortiOS, FortiProxy, and FortiSASE. It allows an unauthenticated attacker to perform a reflected cross-site scripting (XSS) attack by sending crafted HTTP requests. This means that malicious scripts can be injected into web pages viewed by other users.

Impact Analysis

The vulnerability can allow an attacker to execute malicious scripts in the context of a user's browser session, potentially leading to theft of sensitive information, session hijacking, or other malicious actions. Since the attacker can be unauthenticated, it increases the risk of exploitation remotely over the network.

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