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

High severity · published Jun 10, 2020

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

8.8

CVSS

1.4%

EPSS

On KEV

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack vector

Network

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)1.4% · higher than 72% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

GitLab · GitLab

11.3.0 before 11.9.8; 11.3.0 before 12.9.8; 12.10.0 before 12.10.7; 12.10.0 before 12.10.7; 13.0.0 before 13.0.1; 13.0.0 before 13.0.1 · source: NVD

Affected product

GitLab

All GitLab CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-13270

CVE.org

https://www.cve.org/CVERecord?id=CVE-2020-13270

Vendor Advisory

https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13270.json

Broken Link

https://gitlab.com/gitlab-org/gitlab/-/issues/24648

Permissions Required

https://hackerone.com/reports/419977