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Description

An issue has been discovered in GitLab affecting all versions starting from 15.2 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. A namespace-level banned user can access the API.

PUBLISHED Reserved 2023-03-22 | Published 2023-09-01 | Updated 2025-11-20 | Assigner GitLab




LOW: 2.7CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

Problem types

CWE-862: Missing Authorization

Product status

Default status
unaffected

15.2 (semver) before 16.1.5
affected

16.2 (semver) before 16.2.5
affected

16.3 (semver) before 16.3.1
affected

Credits

Thanks [ali_shehab](https://hackerone.com/ali_shehab) for reporting this vulnerability through our HackerOne bug bounty program finder

References

gitlab.com/gitlab-org/gitlab/-/issues/398587 (GitLab Issue #398587) issue-tracking permissions-required

hackerone.com/reports/1911908 (HackerOne Bug Bounty Report #1911908) technical-description exploit

gitlab.com/gitlab-org/gitlab/-/issues/398587 (GitLab Issue #398587) issue-tracking permissions-required

hackerone.com/reports/1911908 (HackerOne Bug Bounty Report #1911908) technical-description exploit permissions-required

cve.org (CVE-2023-1555)

nvd.nist.gov (CVE-2023-1555)

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