UpHeron
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Servers and applications

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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021.

Severity
Critical 9.8
Published
4 Jun 2019
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.2.9, 5.4.13, 5.6.8, 6.0.5
Exploit chance
100% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Fortinet FortiProxyServers and applications · cpe:a:fortinet:fortiproxy
  • Every version before 1.2.9
  • Version 2.0.0
Fortinet FortiOSServers and applications · cpe:o:fortinet:fortios
  • From 5.4.6 before 5.4.13
  • From 5.6.3 before 5.6.8
  • From 6.0.0 before 6.0.5

Known exploited

CISA name
Fortinet FortiOS SSL VPN Path Traversal Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
3 May 2022
Used in ransomware
Yes, known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-13379
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-13379