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Fortinet FortiSIEM 6.4.x < 7.2.7 / 7.3.x < 7.3.5 / 7.4.x < 7.4.1 XSS (FG-IR-26-149)

medium Nessus Plugin ID 327607

Synopsis

The remote host is affected by a cross-site scripting vulnerability.

Description

The version of Fortinet FortiSIEM running on the remote host is 6.4.x through 7.2.x prior to 7.2.7, 7.3.x prior to 7.3.5, or 7.4.0. It is, therefore, affected by a cross-site scripting vulnerability:

 - An improper neutralization of script-related HTML tags in a web page (basic XSS) vulnerability in Fortinet FortiSIEM may allow a privileged administrator to execute unauthorized commands via crafted requests.
 (CVE-2026-59838)

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

Solution

Upgrade to Fortinet FortiSIEM version 7.2.7, 7.3.5, or 7.4.1 or later.

See Also

https://fortiguard.fortinet.com/psirt/FG-IR-26-149

Plugin Details

Severity: Medium

ID: 327607

File Name: fortinet_fortisiem_FG-IR-26-149.nasl

Version: 1.1

Type: Combined

Agent: unix

Family: Misc.

Published: 7/17/2026

Updated: 7/17/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.61

CVSS v2

Risk Factor: Medium

Base Score: 5.8

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

CVSS Score Source: CVE-2026-59838

CVSS v3

Risk Factor: Medium

Base Score: 5.9

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

Vulnerability Information

CPE: cpe:/a:fortinet:fortisiem

Required KB Items: installed_sw/Fortinet FortiSIEM

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-59838

CWE: 80