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CVE-2025-31366

MEDIUM

6.1

CVSS Score

Published: October 14, 2025 at 03:22 PM UTC

Updated: October 18, 2026 at 09:10 PM UTC

4 products affected across 2 vendorsFortiOSFortiProxyFortiSASE

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Severity

MEDIUM6.1

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FortiOS · Fortinet

95%

All versions6.4.0 ≤ v < 7.4.97.6.0 ≤ v < 7.6.46.4.0 6.4.1 6.4.10 6.4.11 6.4.12 6.4.13 6.4.14 6.4.15 6.4.16 6.4.2 6.4.3 6.4.4 6.4.5 6.4.6 6.4.7 6.4.8 6.4.9 7.0.0 7.0.1 7.0.10 7.0.11 7.0.12 7.0.13 7.0.14 7.0.15 7.0.16 7.0.17 7.0.18 7.0.19 7.0.2 7.0.3 7.0.4 7.0.5 7.0.6 7.0.7 7.0.8 7.0.9 7.2.0 7.2.1 7.2.10 7.2.11 7.2.12 7.2.13 7.2.2 7.2.3 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.4.0 7.4.1 7.4.2 7.4.3 7.4.4 7.4.5 7.4.6 7.4.7 7.6.0 7.6.1 7.6.2

Affected range stops below 7.4.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.6.4, so it looks safe — our inference, not a vendor statement

FortiProxy · Fortinet

95%

All versions7.0.0 ≤ v < 7.6.47.0.0 7.0.1 7.0.10 7.0.11 7.0.12 7.0.13 7.0.14 7.0.15 7.0.16 7.0.17 7.0.18 7.0.19 7.0.2 7.0.20 7.0.21 7.0.22 7.0.23 7.0.3 7.0.4 7.0.5 7.0.6 7.0.7 7.0.8 7.0.9 7.2.0 7.2.1 7.2.10 7.2.11 7.2.12 7.2.13 7.2.14 7.2.15 7.2.16 7.2.2 7.2.3 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.4.0 7.4.1 7.4.2 7.4.3 7.4.4 7.4.5 7.4.6 7.4.7 7.4.8 7.6.0 7.6.1 7.6.2 7.6.3

Affected range stops below 7.6.4, so it looks safe — our inference, not a vendor statement

FortiSASE · Fortinet

95%

RUGGEDCOM APE1808 Firmware · Siemens

60%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://fortiguard.fortinet.com/psirt/FG-IR-24-542

References (2)

Vendor Advisory

Source: cverecord

https://fortiguard.fortinet.com/psirt/FG-IR-24-542

Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

https://cert-portal.siemens.com/productcert/html/ssa-864900.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-79

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