CVE-2020-13334

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-07 · updated 2026-06-17
Weakness: CWE-863

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

Affected products

GitLab: from 8.6.0 before 13.2.10; from 13.3.0 before 13.3.7; from 13.4.0 before 13.4.2 — fixed in 13.2.10, 13.3.7, 13.4.2

How to fix

Upgrade to a fixed version: GitLab 13.2.10, 13.3.7, 13.4.2. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13334.json
https://gitlab.com/gitlab-org/gitlab/-/issues/195327
https://hackerone.com/reports/762271
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13334.json
https://gitlab.com/gitlab-org/gitlab/-/issues/195327
https://hackerone.com/reports/762271

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