What is CVE-2020-13272?

CVE-2020-13272 is a high-severity vulnerability in GitLab, classified under Insufficient Verification of Data Authenticity. CVSS score: 7.5/10. Published 2020-06-19.

How severe is CVE-2020-13272?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in GitLab

CVE-2020-13272

OAuth flow missing verification checks CE/EE 12.3 and later through 13.0.1 allows unverified user to use OAuth authorization code flow

Published 2020-06-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

GitLab — versions >=12.10, <12.10.7, >=12.3, <12.9.8, 13.0.0

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

gitlab.com/gitlab-org/gitlab/-/issues/37038 (Broken Link)
hackerone.com/reports/743556 (Permissions Required)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13272.json (Vendor Advisory)

Frequently asked questions

What is CVE-2020-13272?: CVE-2020-13272 is a high-severity vulnerability in GitLab, classified under Insufficient Verification of Data Authenticity. CVSS score: 7.5/10. Published 2020-06-19.
How severe is CVE-2020-13272?: High severity. CVSS v3 base score is 7.5 out of 10.