CVE-2018-13382

An Improper Authorization vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8 and 5...

9.1 CriticalIn KEVPublic exploit

An Improper Authorization vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8 and 5.4.1 to 5.4.10 and FortiProxy 2.0.0, 1.2.0 to 1.2.8, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 under SSL VPN web portal allows an unauthenticated attacker to modify the password of an SSL VPN web portal user via specially crafted HTTP requests

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

81.7%Up 76.0 points since Apr 14, 2021

What each source reports

CVE List Score used 9.1

Record: CVE-2018-13382
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-863
Updated: 2026-11-02

EUVDEUVD-2018-5326 9.1

Record: EUVD-2018-5326
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-chg2-j3mj-m3rj 7.5

An Improper Authorization vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8 and 5...

An Improper Authorization vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8 and 5.4.1 to 5.4.10 under SSL VPN web portal allows an unauthenticated attacker to modify the password of an SSL VPN web portal user via specially crafted HTTP requests.

Record: GHSA-chg2-j3mj-m3rj
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-285, CWE-863
Updated: 2026-11-02

CISA KEV No score

Fortinet FortiOS and FortiProxy Improper Authorization

An Improper Authorization vulnerability in Fortinet FortiOS and FortiProxy under SSL VPN web portal allows an unauthenticated attacker to modify the password.

Record: CVE-2018-13382
Weakness: CWE-285
Updated: 2026-11-02

NVD 9.1

Record: CVE-2018-13382
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness: CWE-863
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	milo2012/CVE-2018-13382	2019-08-11
Exploit-DB	Fortinet FortiOS 6.0.4 - Unauthenticated SSL VPN User Password Modification	2020-11-19
PoC in GitHub	tumikoto/Exploit-FortinetMagicBackdoor	2021-04-28
PoC in GitHub	cojoben/CVE-2018-13382	2025-02-26

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-13382 is a critical vulnerability (CVSS 9.1) in Fortinet Fortios, published June 4, 2019. CISA lists it as known to be exploited, since January 10, 2022. EUVD reports exploitation since January 10, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 81.7%, the 99th percentile. No source names a fixed version.