CVE-2019-15581Public exploitNetwork attack vector

Private-group member disclosure via unchecked approver group IDs

Published Jan 28, 2020 · Updated Aug 5, 2024

IDOR in GitLab EE before 12.1.12, 12.2.6, or 12.3.2 allows remote authenticated users to view private-group members. Merge request approval settings accept an attacker-controlled approver_group_ids value and resolve an unauthorized private group into member records without verifying group access. The required project Owner or Maintainer role and enabled merge request approvals bound the impact to disclosure of private-group membership.

CVSS severity5.3
Medium
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in GitLab EE before 12.1.12, 12.2.6, or 12.3.2 allows remote authenticated users to view private-group members. Merge request approval settings accept an attacker-controlled approver_group_ids value and resolve an unauthorized private group into member records without verifying group access. The required project Owner or Maintainer role and enabled merge request approvals bound the impact to disclosure of private-group membership.

The record

CVE
CVE-2019-15581
Published
Jan 28, 2020
Updated
Aug 5, 2024
Vendor
GitLab
Product
GitLab EE
Classifications
CWE-639, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 28, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=before 12.1.12
  2. Affected versionversion=before 12.2.6
  3. Affected versionversion=before 12.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLab EEversion=before 12.1.12; version=before 12.2.6; version=before 12.3.2

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1087Account Discovery

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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