No exploitation reportedFix available

CVE-2020-13270

Q: Is CVE-2020-13270 actively exploited?

Active exploitation of CVE-2020-13270 has not been confirmed. Its EPSS score was 1.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-13270?

CVE-2020-13270 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2020-06-10
Fixed in13.0.1 · 12.10.7 · 12.9.8 · 11.9.8
WeaknessCWE-862

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Missing permission check on fork relation creation in GitLab CE/EE 11.3 and later through 13.0.1 allows guest users to create a fork relation on restricted public projects via API

Timeline

dates in UTC

2020-06-1015:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-13270?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-13270?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

GitLab

Branch	Affected	Fixed in	Source
13.0	≥ 13.0.0, < 13.0.1	13.0.1	NVD
12.10	≥ 12.10.0, < 12.10.7	12.10.7	NVD
12.9	≥ 11.3.0, < 12.9.8	12.9.8	NVD
11.x	≥ 11.3.0, < 11.9.8	11.9.8	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update GitLab to 13.0.1 · 12.10.7 · 12.9.8 · 11.9.8

Advisories and patches

gitlab.comVendor Advisory
gitlab.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.17.5read 2026-10-23
NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.06.5read 2026-10-23
NVDweakness (CWE)CWE-862read 2026-10-23
FIRST EPSSEPSS score1.4 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2020-06-10
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-13270?

Missing permission check on fork relation creation in GitLab CE/EE 11.3 and later through 13.0.1 allows guest users to create a fork relation on restricted public projects via API

Is CVE-2020-13270 actively exploited?

Active exploitation of CVE-2020-13270 has not been confirmed. Its EPSS score was 1.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-13270?

CVE-2020-13270 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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