CVE-2020-13270 json
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 relati…
published 2020-06-10 6 y ago modified 2026-09-10 59 d ago also BIT-gitlab-2020-13270 , EUVD-2020-5531
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- bitnami gitlab 12.9.8, 12.10.7, 13.0.1
- gitlab gitlab 12.9.8, 12.10.7, 13.0.1
- gitlab gitlab_enterprise 12.9.8, 12.10.7, 13.0.1
Exploit prediction
1.37% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=11.3.0, <12.9.8 >=12.10.0, <12.10.7 >=13.0.0, <13.0.1 |
12.9.8 12.10.7 13.0.1 |
Affected products
- GitLab GitLab
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
-
gitlab.com
/gitlab-org/gitlab/-/issues/24648
broken-link, vendor-advisory, advisory
-
gitlab.com
/gitlab-org/cves/-/blob/master/2020/CVE-2020-13270.json
vendor-advisory, advisory
-
hackerone.com
/reports/419977
permissions-required, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-13270
web
Sources
- CVE List CVE-2020-13270
- NVD CVE-2020-13270
- OSV BIT-gitlab-2020-13270
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Enhance with deb and rpm package type records.