Fortinet FortiOS 5.4.1 < 5.4.11 / 5.6.x < 5.6.9 / 6.0.x < 6.0.5 SSL VPN Security Bypass (FG-IR-18-389)

medium Nessus Plugin ID 125888
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VPR Score: 5.1


The remote host is affected by a security bypass vulnerability.


The remote host is running a version of FortiOS 5.4.1 prior to 5.4.11, 5.6.x prior to 5.6.9 or 6.0.x prior to 6.0.5. It is, therefore, affected by a security bypass vulnerability in the SSL VPN web portal, due to an error when processing HTTP requests. A remote, unauthenticated attacker can exploit this, by sending a specially crafted HTTP request to change the password of an arbitrary SSL VPN web portal user.


Upgrade to Fortinet FortiOS version to 5.4.11, 5.6.9, 6.0.5, 6.2.0 or later. Alternatively, apply one of the workarounds outlined in the linked advisory

See Also

Plugin Details

Severity: Medium

ID: 125888

File Name: fortios_FG-IR-18-389.nasl

Version: 1.10

Type: local

Family: Firewalls

Published: 6/14/2019

Updated: 4/29/2021

Dependencies: fortinet_version.nbin

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 5.1

CVSS Score Source: CVE-2018-13382

CVSS v2.0

Base Score: 5

Temporal Score: 3.9

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/24/2019

Vulnerability Publication Date: 5/24/2019

Reference Information

CVE: CVE-2018-13382

BID: 108697

IAVA: 0001-A-0005-S