CVE-2025-68620Public exploitNetwork attack vector

Authentication bypass via exposed access-request tokens

Published Jan 1, 2026 · Updated Jan 1, 2026

Authentication bypass in Signal K Server before 2.19.0 allows remote attackers to steal JWT tokens through unauthenticated endpoints. startServerEvents sends cached ACCESS_REQUEST events to readonly WebSocket clients, while queryRequest returns approved requests with plaintext tokens. With allow_readonly enabled, no prior account is required; an administrator must approve a request before its token can be captured and reused.

CVSS severity9.1
Critical
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Signal K Server before 2.19.0 allows remote attackers to steal JWT tokens through unauthenticated endpoints. startServerEvents sends cached ACCESS_REQUEST events to readonly WebSocket clients, while queryRequest returns approved requests with plaintext tokens. With allow_readonly enabled, no prior account is required; an administrator must approve a request before its token can be captured and reused.

The record

CVE
CVE-2025-68620
Published
Jan 1, 2026
Updated
Jan 1, 2026
Vendor
Signal K
Product
Signal K Server
Classifications
CWE-288, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 1, 2026Record 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=< 2.19.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Signal K · Signal K Serverversion=< 2.19.0

Published CVSS scores

9.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1528Steal Application Access Token

Public exploit references

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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