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CVE-2018-13379

99
FAUCET Score

CVE-2018-13379 is a critical path traversal vulnerability affecting the SSL VPN web portal in various versions of Fortinet FortiOS and FortiProxy. Rated with a CVSS score of 9.8, this flaw allows unauthenticated remote attackers to download system files via specially crafted HTTP requests, leading to the exposure of sensitive session data and plaintext credentials without requiring user interaction. The vulnerability is actively exploited in the wild by ransomware cartels and APT groups, earning it a place in the CISA Known Exploited Vulnerabilities catalog. With public exploit code available in frameworks like Metasploit and confirmed reports of massive credential leaks, immediate remediation is essential to prevent unauthorized network access.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.9CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiproxy:2.0.0:*:*:*:*:*:*:*
>= 5.4.6, < 5.4.13CPE matchmatch criteria
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
>= 5.6.3, < 5.6.8CPE matchmatch criteria
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.0.5CPE matchmatch criteria
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
100.00%
Probability of exploitation in next 30 days
EPSS Percentile
100.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Nov 3, 2021
Nuclei: CVE-2018-13379 · Apr 22, 2020
ExploitDB: EDB-47287 · Aug 19, 2019
This CVE's current EPSS score of 1.0000 is in the 100th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

fortinetvendor investigatingvia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
fortiguard.com / advisory/FG-IR-18-384
MitigationVendor Advisory
fortiguard.com / psirt/FG-IR-20-233
Vendor Advisory