What’s Vulnerable › Vulnerabilities

CVE-2020-13356

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-11-19 · updated 2026-06-17

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 8.8.9. A specially crafted request could bypass Multipart protection and read files in certain specific paths on the server. Affected versions are: >=8.8.9, <13.3.9,>=13.4, <13.4.5,>=13.5, <13.5.2.

Affected products

• GitLab: from 8.8.9 before 13.3.9; from 13.4.0 before 13.4.5; from 13.5.0 before 13.5.2 — fixed in 13.3.9, 13.4.5, 13.5.2

How to fix

Upgrade to a fixed version: GitLab 13.3.9, 13.4.5, 13.5.2. Check the vendor advisory for mitigations.

References

• https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13356.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/230878
• https://hackerone.com/reports/927953
• https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13356.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/230878
• https://hackerone.com/reports/927953

Get alerted when CVE-2020-13356 or the next vulnerability affects your stack