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Fortinet Fortigate xss (FG-IR-24-542)

medium Nessus Plugin ID 270363

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Synopsis

Remote host is affected by a xss vulnerability.

Description

The version of Fortigate installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the FG-IR-24-542 advisory.

 - An URL Redirection to Untrusted Site vulnerabilities [CWE-601] in FortiOS 7.6.0 through 7.6.2, 7.4.0 through 7.4.8, 7.2 all versions, 7.0 all versions, 6.4 all versions; FortiProxy 7.6.0 through 7.6.3, 7.4 all versions, 7.2 all versions, 7.0 all versions; FortiSASE 25.2.a may allow an unauthenticated attacker to perform an open redirect attack via crafted HTTP requests. (CVE-2025-47890)

 - 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.
 (CVE-2025-31366)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

For 6.4.x / 7.0.x / 7.2.x, see vendor advisory. For 7.4.x, upgrade to Fortigate version 7.4.9 or later. For 7.6.x, upgrade to Fortigate version 7.6.4 or later.

See Also

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

Plugin Details

Severity: Medium

ID: 270363

File Name: fortigate_FG-IR-24-542.nasl

Version: 1.1

Type: local

Family: Firewalls

Published: 10/14/2025

Updated: 10/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.9

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2025-47890

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

Required KB Items: Host/Fortigate/model, Host/Fortigate/version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/14/2025

Vulnerability Publication Date: 10/14/2025

Reference Information

CVE: CVE-2025-31366, CVE-2025-47890