CVE-2018-13379

Name: CVE-2018-13379
Creator: NVD / NIST
Published: 2019-06-04T21:29:00.233+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 100.00%

Last modified Jun 17, 2026

CVE-2018-13379 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.3 to 5.6.7 and 5.4.6 to 5.4.12 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 download system files via special crafted HTTP resource requests.. CISA has confirmed active exploitation in the wild. EPSS estimates a 100.00% chance of exploitation in the next 30 days.

Description

An Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.3 to 5.6.7 and 5.4.6 to 5.4.12 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 download system files via special crafted HTTP resource requests.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

100.00%

100.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Fortinet	Fortiproxy	< 1.2.9
Fortinet	Fortiproxy	2.0.0
Fortinet	Fortios	>= 5.4.6, < 5.4.13
Fortinet	Fortios	>= 5.6.3, < 5.6.8
Fortinet	Fortios	>= 6.0.0, < 6.0.5

References

https://fortiguard.com/advisory/FG-IR-18-384Mitigation, Vendor Advisory
https://www.fortiguard.com/psirt/FG-IR-20-233Vendor Advisory
https://fortiguard.com/advisory/FG-IR-18-384Mitigation, Vendor Advisory
https://www.fortiguard.com/psirt/FG-IR-20-233Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-13379US Government Resource

Timeline

Published: Jun 4, 2019
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-13379?

How severe is CVE-2018-13379?

CVE-2018-13379 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 100.00% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-13379?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-13379?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST