CVE-2023-4018Public exploitNetwork attack vector

Unauthorized experiment creation via membership check omission

Published Sep 1, 2023 · Updated Aug 14, 2026

Improper authorization in GitLab 16.2 through 16.2.4 and 16.3.0 allows remote authenticated users to create model experiments in public projects. The model-experiment API entrypoint validates only the access-token scope and fails to verify that the caller belongs to the target project. Any authenticated non-member with an API-scoped token can add experiment records and read experiment data when the feature is enabled for a public project.

CVSS severity4.3
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in GitLab 16.2 through 16.2.4 and 16.3.0 allows remote authenticated users to create model experiments in public projects. The model-experiment API entrypoint validates only the access-token scope and fails to verify that the caller belongs to the target project. Any authenticated non-member with an API-scoped token can add experiment records and read experiment data when the feature is enabled for a public project.

The record

CVE
CVE-2023-4018
Published
Sep 1, 2023
Updated
Aug 14, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-425, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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=16.2 <16.2.5
  2. Affected versionversion=16.3 <16.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=16.2 <16.2.5; version=16.3 <16.3.1

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-425Direct Request ('Forced Browsing')
T1565.001Stored Data Manipulation

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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