CVE-2018-13379
An Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") in Fortinet...
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.
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
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2018-13379- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2018-5323
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.
- Record
EUVD-2018-5323- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-2q79-m25p-r2q3
An Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") in Fortinet...
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 under SSL VPN web portal allows an unauthenticated attacker to download system files via special crafted HTTP resource requests.
- Record
GHSA-2q79-m25p-r2q3- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-22
- Updated
- 2026-11-02
CISA KEV No score
Fortinet FortiOS SSL VPN Path Traversal Vulnerability
Fortinet FortiOS SSL VPN web portal contains a path traversal vulnerability that may allow an unauthenticated attacker to download FortiOS system files through specially crafted HTTP resource requests.
- Record
CVE-2018-13379- Weakness
- CWE-22
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2018-13379- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | milo2012/CVE-2018-13379 | 2019-08-11 |
| PoC in GitHub | jpiechowka/at-doom-fortigate | 2019-08-18 |
| Exploit-DB | Fortinet FortiOS 5.6.3 - 5.6.7 / FortiOS 6.0.0 - 6.0.4 - Credentials Disclosure (Metasploit) | 2019-08-19 |
| Exploit-DB | Fortinet FortiOS 5.6.3 - 5.6.7 / FortiOS 6.0.0 - 6.0.4 - Credentials Disclosure | 2019-08-19 |
| PoC in GitHub | 0xHunter/FortiOS-Credentials-Disclosure | 2019-09-24 |
| PoC in GitHub | Blazz3/cve2018-13379-nmap-script | 2019-10-14 |
| PoC in GitHub | yukar1z0e/CVE-2018-13379 | 2020-05-18 |
| PoC in GitHub | pwn3z/CVE-2018-13379-FortinetVPN | 2020-09-17 |
| PoC in GitHub | k4nfr3/CVE-2018-13379-Fortinet | 2020-11-19 |
| PoC in GitHub | Zeop-CyberSec/fortios_vpnssl_traversal_leak | 2020-11-30 |
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| Source | Link | Date |
|---|---|---|
| PoC in GitHub | B1anda0/CVE-2018-13379 | 2020-12-14 |
| PoC in GitHub | nivdolgin/CVE-2018-13379 | 2021-09-11 |
| PoC in GitHub | kh4sh3i/CVE-2018-13379 | 2025-09-21 |
| PoC in GitHub | Zierax/CVE-2018-13379 | 2026-02-05 |
| PoC in GitHub | Instructor-Admin/Multi-threaded-mass-exploiter-CVE-2018-13379-POC | 2026-05-23 |
| PoC in GitHub | Vampsecure-Labs/vamp-forticheck | 2026-07-31 |
| Nuclei | Fortinet FortiOS - Credentials Disclosure | |
| Metasploit | FortiOS Path Traversal Credential Gatherer |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation, exploits | ||
| first indexed | CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-13379 is a critical vulnerability (CVSS 9.1) in Fortinet Fortios, published June 4, 2019. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 100.0%, the 99th percentile. No source names a fixed version.
References
fortiguard.com/advisory/FG-IR-18-384
fortiguard.com/psirt/FG-IR-20-233
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-13379
nvd.nist.gov/vuln/detail/CVE-2018-13379
github.com/blacklotuslabs/Development/blob/master/Mitigations/CVE/CVE-2018-13379/CVE-2018-13379%20-%20Summary%20%26%20Emergency%20Mitigations.pdf
i.blackhat.com/USA-19/Wednesday/us-19-Tsai-Infiltrating-Corporate-Intranet-Like-NSA.pdf
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packetstormsecurity.com/files/154146/FortiOS-5.6.7-6.0.4-Credential-Disclosure.html
securityfocus.com/bid/108693
devco.re/blog/2019/08/09/attacking-ssl-vpn-part-2-breaking-the-Fortigate-ssl-vpn