# CVE-2018-13379: Fortinet FortiOS SSL VPN Path Traversal Vulnerability

> CVE-2018-13379: Fortinet FortiOS SSL VPN Path Traversal Vulnerability. CVSS 9.1 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-13379
Last updated: 2025-10-21T23:45:35Z

- Published: 2019-06-04 20:18 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: fortinet
- CVSS: 9.1 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- EPSS: 100.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2021-11-03, federal due date 2022-05-03, ransomware use: Known

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Fortinet: Fortinet FortiOS, FortiProxy

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-13379)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-13379)
- [https://fortiguard.com/advisory/FG-IR-18-384](https://fortiguard.com/advisory/FG-IR-18-384)
- [https://www.fortiguard.com/psirt/FG-IR-20-233](https://www.fortiguard.com/psirt/FG-IR-20-233)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-13379 · Markdown: https://rewindex.com/cve/CVE-2018-13379.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-13379 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:47:11.285Z