CVE-2023-23929Network attack vector

Persistent account access via nonexpiring refresh tokens

Published Mar 3, 2023 · Updated Feb 25, 2025

Insufficient session expiration in vantage6 before 3.8.0 allows remote authenticated users to retain account access with old refresh tokens. The server sets JWT_REFRESH_TOKEN_EXPIRES to False, so refresh credentials issued after login carry no enforced lifetime. Possession of a previously issued token is required, and reuse preserves the associated account privileges until the server invalidates its signing secret.

CVSS severity8.8
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient session expiration in vantage6 before 3.8.0 allows remote authenticated users to retain account access with old refresh tokens. The server sets JWT_REFRESH_TOKEN_EXPIRES to False, so refresh credentials issued after login carry no enforced lifetime. Possession of a previously issued token is required, and reuse preserves the associated account privileges until the server invalidates its signing secret.

The record

CVE
CVE-2023-23929
Published
Mar 3, 2023
Updated
Feb 25, 2025
Vendor
vantage6
Product
vantage6
Classifications
CWE-613, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2025Record 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=< 3.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

vantage6 · vantage6version=< 3.8.0

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
T1078Valid Accounts

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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