What’s Vulnerable › Vulnerabilities

CVE-2020-13346

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% 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-459

Description

Membership changes are not reflected in ToDo subscriptions in GitLab versions prior to 13.2.10, 13.3.7 and 13.4.2, allowing guest users to access confidential issues through API.

Affected products

• GitLab: from 11.2.0 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-2020-13346.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/219496
• https://hackerone.com/reports/880863
• https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13346.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/219496
• https://hackerone.com/reports/880863

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