CVE-2025-31366

MediumCVSS 4.7

Published: 14/10/2025(UTC)Updated: 08/07/2026(UTC)Translated: 10/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.37%

29th percentile - higher than 29% of all known CVEs

Summary

A reflected XSS vulnerability in FortiOS, FortiProxy, and FortiSASE allows an unauthenticated attacker to execute scripts in a victim's browser via crafted HTTP requests. The issue stems from improper input neutralization during web page generation.

Risk Assessment

An attacker can hijack admin or user sessions, steal credentials, or spread malware within the organization's network.

Recommendation

Immediately update FortiOS, FortiProxy, and FortiSASE to patched versions. Until then, restrict administrative panel access to trusted IP addresses only.

Original NVD description (English source)

An Improper Neutralization of Input During Web Page Generation vulnerability [CWE-79] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiProxy 7.6.0 through 7.6.3, FortiProxy 7.4 all versions, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions, FortiSASE 25.2.a may allow an unauthenticated attacker to perform a reflected cross site scripting (XSS) via crafted HTTP requests.