CVE-2020-13334 - CVE House
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Status published Medium CVE-2020-13334

In GitLab versions prior to 13.2.10, 13.3.7 and 13.4.2, improper...

Vulnerability Description

In GitLab versions prior to 13.2.10, 13.3.7 and 13.4.2, improper authorization checks allow a non-member of a project/group to change the confidentiality attribute of issue via mutation GraphQL query

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Thanks [0xwintermute](https://hackerone.com/0xwintermute) for reporting this vulnerability through our HackerOne bug bounty program

References

More from GitLab

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CVE-2025-9642
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CVE-2025-9484
Missing Authorization in GitLab
Medium 4.3

Affected Vendor

Affected Software

GitLab
Vulnerable Versions:
>=8.6, <13.2.10, >=13.3.0, <13.3.7, >=13.4.0, <13.4.2

Timeline

Official Publish: October 7th, 2020
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.