CVE-2025-66698Public exploitNetwork attack vector

Unauthenticated data access via empty ticket

Published Jan 13, 2026 · Updated Jan 13, 2026

Authentication bypass in Semantic Machines Veda 5.4.8 allows remote attackers to read protected API data via an empty ticket parameter. The API authentication logic treats an empty ticket value as a valid session, so get_individual, get_membership, and is_ticket_valid accept requests without credentials. Network access to the HTTPS API is sufficient; the demonstrated result exposes user records and personally identifiable information but does not show data modification or service interruption.

CVSS severity8.6
High
EPSS probability0.49%
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 Semantic Machines Veda 5.4.8 allows remote attackers to read protected API data via an empty ticket parameter. The API authentication logic treats an empty ticket value as a valid session, so get_individual, get_membership, and is_ticket_valid accept requests without credentials. Network access to the HTTPS API is sufficient; the demonstrated result exposes user records and personally identifiable information but does not show data modification or service interruption.

The record

CVE
CVE-2025-66698
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/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-287Improper Authentication
T1190Exploit Public-Facing Application

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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