CVE-2019-17654Network attack vector

Session hijacking via insufficient WebSocket authenticity checks

Published Mar 15, 2020 · Updated Oct 25, 2024

Cross-site WebSocket hijacking in Fortinet FortiManager 6.2.1, 6.2.0, and 6.0.6 and earlier allows remote attackers to hijack sessions. Fortinet identifies insufficient authenticity verification but does not disclose the affected WebSocket endpoint or the exact validation failure. Exploitation requires a FortiManager user to load attacker-controlled web content, allowing access within that user's management session.

CVSS severity8.8
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site WebSocket hijacking in Fortinet FortiManager 6.2.1, 6.2.0, and 6.0.6 and earlier allows remote attackers to hijack sessions. Fortinet identifies insufficient authenticity verification but does not disclose the affected WebSocket endpoint or the exact validation failure. Exploitation requires a FortiManager user to load attacker-controlled web content, allowing access within that user's management session.

The record

CVE
CVE-2019-17654
Published
Mar 15, 2020
Updated
Oct 25, 2024
Vendor
Fortinet
Product
FortiManager
Classifications
CWE-345, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.0.6 and below
  2. Affected versionversion=6.2.0
  3. Affected versionversion=6.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiManagerversion=6.0.6 and below; version=6.2.0; version=6.2.1

Published CVSS scores

6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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