Fortinet FortiOS SSL VPN Path Traversal Vulnerability
Fortinet — Fortinet FortiOS, FortiProxy
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.
9.1
100.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Published
- Jun 4, 2019
- Modified
- Oct 21, 2025
- Added to KEV
- Nov 3, 2021
- Federal patch due
- May 3, 2022
CISA required action
Apply updates per vendor instructions.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
8 foundWeaponization
Public repositories whose name or description references CVE-2018-13379, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- milo2012/CVE-2018-13379★ 253
CVE-2018-13379
updated May 18, 2026
- Blazz3/cve2018-13379-nmap-script★ 12
CVE-2018-13379 Script for Nmap NSE.
updated Aug 30, 2022
- B1anda0/CVE-2018-13379★ 9
Fortinet FortiOS路径遍历漏洞 （CVE-2018-13379）批量检测脚本
updated Jul 20, 2026
- Zeop-CyberSec/fortios_vpnssl_traversal_leak★ 9
This module massively scan and exploit a path traversal vulnerability in the FortiOS SSL VPN web portal may allow an unauthenticated attacker to download FortiOS system files through specially crafted HTTP resource requests (CVE-2018-13379).
updated May 20, 2026
- 0xHunter/FortiOS-Credentials-Disclosure★ 6
CVE-2018-13379 Exploit
updated Apr 29, 2025
- k4nfr3/CVE-2018-13379-Fortinet★ 6
FortiVuln
updated Feb 9, 2026
- jpiechowka/at-doom-fortigate★ 5
Fortigate CVE-2018-13379 - Tool to search for vulnerable Fortigate hosts in Rapid7 Project Sonar data anonymously through The Tor network.
updated Jan 14, 2025
- Zierax/CVE-2018-13379★ 2
CVE-2018-13379 fortiOS vulnerability POC
updated Jul 4, 2026
References
How this class of flaw gets exploited
Frequently asked questions
What is CVE-2018-13379?
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.
How severe is CVE-2018-13379?
CVE-2018-13379 has a CVSS base score of 9.1 out of 10 (CVSS 3.1).
Is CVE-2018-13379 actively exploited in the wild?
Yes. CVE-2018-13379 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Nov 3, 2021, meaning CISA has confirmed evidence of active exploitation. It is also flagged as used in ransomware campaigns.
What is the EPSS score for CVE-2018-13379?
100.0% - meaning FIRST.org's EPSS model estimates a 100.0% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2018-13379?
Yes - a public Nuclei template referencing CVE-2018-13379 exist in public repositories we checked. We also found 8 public GitHub repositories referencing this CVE.
What type of vulnerability is CVE-2018-13379?
CVE-2018-13379 is classified under CWE-22 (CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')).
Cross-checked against
Impactr finds and proves whether CVE-2018-13379 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.