CVEs / CVE-2018-13382

CVE-2018-13382: Fortinet FortiOS and FortiProxy Improper Authorization

Known exploited in the CISA KEV catalog since 10 Jan 2022
high 7.5 CVSS 3.1 (NVD)
EPSS 81.6% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

An Improper Authorization vulnerability in Fortinet FortiOS and FortiProxy under SSL VPN web portal allows an unauthenticated attacker to modify the password.
CISA, Known Exploited Vulnerabilities catalog

Description

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
The CVE record, via NVD · published 4 Jun 2019 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
Fortinet Fortinet FortiOS, FortiProxy	FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8, 5.4.1 to 5.4.10, 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	—

Exploitation

In CISA KEV since	10 Jan 2022
Due date for US federal agencies	10 Jul 2022
Used in ransomware campaigns	Known
Required action	Apply updates per vendor instructions.

Severity

CVSS 3.1	7.5 high `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N` Scored by NVD
Weakness	CWE-863

References

CVE-2018-13382 on NVD
CVE-2018-13382 in the CISA KEV catalog
https://fortiguard.com/advisory/FG-IR-18-389 Vendor Advisory
https://www.fortiguard.com/psirt/FG-IR-20-231 Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-13382 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.