Vulnerability threat dossier

CVE-2018-13379

fortinetfortiproxy

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.

VTP deterministic threat54.5of 100 · CVSS excluded

VTP analyst assessment

FortiOS and FortiProxy SSL VPN path traversal

AI-assisted analytical recommendationDoes not set factual exploitation state
AI review stateREVIEWED
AI priorityNONE
AI confidence85%
Public exploitation · VTP factKEV

Assessment

CVE-2018-13379 lets an unauthenticated attacker use crafted SSL VPN portal requests to download restricted system files. CISA KEV lists known exploitation and known ransomware campaign use.

Why it matters

  • SSL VPN portals are remotely reachable access services.
  • Downloaded system files can expose credentials or configuration information for follow-on access.

Evidence

0 record references and 0 source references passed trusted post-response validation. The current deterministic record contains 0 independent evidence groups.

Uncertainties

Recent Fortinet reporting in this bundle does not identify CVE-2018-13379.

First-party honeypot request semantics are potentially consistent with this CVE. This is an unconfirmed candidate match, not proof of exploitation or successful execution.

Next watchpoint

If you use affected FortiOS or FortiProxy SSL VPN versions, upgrade to a fixed release and rotate exposed credentials.

AI baseline history (2)
  1. BASELINE ASSESSED
    FortiOS and FortiProxy SSL VPN path traversalgpt-5.6-terra · low
  2. BASELINE ASSESSED
    Fortinet SSL VPN path traversalgpt-5.6-sol · high
Technical severityCRITICALCVSS 9.1 · technical context
Public exploitationKEVGlobal public evidence
Exploit maturityTECHNICAL DETAILSReliability not implied
EPSS1.00100th percentile · prediction
Evidence confidence64%Strongest independent active claim
VelocitySTABLEMaterial events only
First-party telemetryFirst-party honeypot request semantics are potentially consistent with this CVE. This is an unconfirmed candidate match, not proof of exploitation or successful execution.
Availability: SENSOR_ONLINE_ACTIVITY_OBSERVED · Evidence: CVE_LIKE_ATTEMPT
LOW

The request shares exploitation-associated characteristics with CVE-2018-13379, but the evidence does not identify one CVE with sufficient confidence.

CANDIDATE LEADTechnical consistency 35/100

Basis: deterministic technical candidate

Potentially consistent; exploitation not confirmedDisclosure embargo completed
01

VTP deterministic assessment

Why this matters

  1. 01

    CISA KEV lists this vulnerability as known to be exploited globally.

  2. 02

    EPSS is 1.00; this is predictive context, not exploitation evidence.

  3. 03

    Exploitation attempts against this CVE were confirmed by first-party telemetry.

  4. 04

    First-party honeypot request semantics are potentially consistent with this CVE. This is an unconfirmed candidate match, not proof of exploitation or successful execution.

02

Material change ledger

What changed

KEV ADDEDCISA KEV entry added
03

Claim provenance

Evidence and source independence

2publications detected
2underlying evidence chains

0 primary sources · 0 dependent secondary reports · 2 reports with unresolved independence. Repetition remains visible without multiplying confirmation.

Source claimZERO DAYPUBLICATION REPORTS ZERO DAY
64%claim confidence
UNKNOWNreport:a3245ac22fbdfa682646d4fa3328850e649e7d6f999276e27ad1da895c6cdfd9ACTIVE
Evidence
04

Event history

Threat timeline

  1. 16:4226 Aug
    ZERO DAY

    Zero Day

    The Hacker News supplied a deterministically extracted signal; review the linked evidence before escalation.

  2. 00:0003 Nov
    KEV ADDED

    CISA KEV entry added

    CISA lists global known exploitation. This is not a VTP sensor observation.

05

Original publications

Source record

Thai Broadband Provider Hacked via Fortinet Vulnerability

The hackers staged numerous scripts for reconnaissance and CVE probing, along with brute-force utilities and privilege escalation tools. The post Thai Broadband Provider Hacked via Fortinet Vulnerability appeared first on SecurityWeek .

CVE-2018-13379CVE-2021-22986CVE-2022-1388CVE-2022-42475CVE-2023-27997CVE-2023-46747CVE-2024-21762
Separate evidence group
Original

FBI Disrupts China-Linked QTFY Infrastructure Used to Steal Data From U.S. Organizations

The U.S. Department of Justice (DoJ) on Wednesday announced the disruption of two hacking platforms named QScan and QTRouter operated by Chinese threat actors to target critical infrastructure and other sensitive networks in the country. The activity has been attributed to a Chinese state-sponsored group known as QTFY, employed by Nanjing Xinjiuwei Network Technology Company (南京鑫玖维网络科技有限公司).&

CVE-2018-13379CVE-2019-10068CVE-2019-19781CVE-2020-5902CVE-2021-26855CVE-2021-44228CVE-2023-22515CVE-2024-24919CVE-2024-8190CVE-2024-8963CVE-2024-9380CVE-2025-31161CVE-2026-1731
Separate evidence group
Original
06

Technical vulnerability data

Context, not threat proof

VTP threat score54.5vtp-threat-v1-public
Public exploitation30 / 30
EPSS prediction20 / 20
Exploit availability2.5 / 15
Source independence0 / 15
Intelligence recency2 / 10
Threat acceleration0 / 10
CVSS technical severityExcluded
CVSS
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CWE
CWE-22
CPE records
3
Deterministic history records
20
Primary technical reference
07

Raw observations

First-party sensor records

First-party honeypot request semantics are potentially consistent with this CVE. This is an unconfirmed candidate match, not proof of exploitation or successful execution.