Fortinet FortiOS CSRF (FG-IR-20-158)

high Nessus Plugin ID 156754
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The remote host is affected by a cross-site request forgery vulnerability.


The remote host is running a version of FortiOS that is 5.6.x, 6.0.x, 6.2.x prior or equal to 6.2.9, 6.4.x prior or equal to 6.4.6, 7.0.0. It is, therefore, affected by a cross-site request forgery vulnerability in the user interface of FortiGate SSL VPN portal, which may allow a remote, unauthenticated attacker to conduct a cross-site request forgery (CSRF) attack . Only SSL VPN in web mode or full mode are impacted by this vulnerability.

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


See vendor advisory.

See Also

Plugin Details

Severity: High

ID: 156754

File Name: fortios_FG-IR-20-158.nasl

Version: 1.2

Type: local

Family: Firewalls

Published: 1/14/2022

Updated: 1/17/2022

Dependencies: fortinet_version.nbin

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2021-26103


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 5.1

Temporal Score: 3.8

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

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/7/2021

Vulnerability Publication Date: 12/7/2021

Reference Information

CVE: CVE-2021-26103

IAVA: 2021-A-0574