What’s Vulnerable › Vulnerabilities

CVE-2021-39902

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-04 · updated 2026-06-17
• Weakness: CWE-863

Description

Incorrect Authorization in GitLab CE/EE 13.4 or above allows a user with guest membership in a project to modify the severity of an incident.

Affected products

• GitLab: from 13.4.0 before 14.2.6; from 14.3.0 before 14.3.4; 14.4.0 — fixed in 14.2.6, 14.3.4

How to fix

Upgrade to a fixed version: GitLab 14.2.6, 14.3.4. Check the vendor advisory for mitigations.

References

• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39902.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/341479
• https://hackerone.com/reports/1341674
• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39902.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/341479
• https://hackerone.com/reports/1341674

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