# CVE-2025-31366

## Summary

- **CVE ID:** CVE-2025-31366
- **Severity:** MEDIUM
- **CVSS Score:** 4.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C)
- **CWE:** CWE-79
- **Published:** Oct 14, 2025
- **Last Modified:** Aug 11, 2026

## Description

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.

## Affected Products

- Fortinet — FortiProxy (7.6.0)
- Fortinet — FortiProxy (7.4.0)
- Fortinet — FortiProxy (7.2.0)
- Fortinet — FortiProxy (7.0.0)
- Fortinet — FortiSASE (25.2.a)
- Fortinet — FortiOS (7.6.0)
- Fortinet — FortiOS (7.4.0)
- Fortinet — FortiOS (7.2.0)
- Fortinet — FortiOS (7.0.0)
- Fortinet — FortiOS (6.4.0)

## References

- [CNA](https://fortiguard.fortinet.com/psirt/FG-IR-24-542)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-864900.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.40%
- **EPSS Percentile:** 33.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._