{"id":"CVE-2020-13270","aliases":["BIT-gitlab-2020-13270","EUVD-2020-5531","GHSA-wgh9-p42c-pq7h","UBUNTU-CVE-2020-13270"],"status":"published","title":"Missing permission check on fork relation creation in GitLab CE/EE 11.3 and later through 13.0.1...","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","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01374,"percentile":0.72235,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-276","CWE-862"],"published":"2020-06-10T14:35:07Z","modified":"2026-10-30T10:30:19Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["12.9.8","12.10.7","13.0.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"11.3.0"},{"fixed":"12.9.8"},{"introduced":"12.10.0"},{"fixed":"12.10.7"},{"introduced":"13.0.0"},{"fixed":"13.0.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gitlab","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.3+dfsg-9","8.4.3+dfsg-12","8.5.8+dfsg-5"]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/24648","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory","advisory","report"]},{"url":"https://hackerone.com/reports/419977","tags":["x_refsource_MISC","x_transferred","Permissions Required","Third Party Advisory","advisory","report"]},{"url":"https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13270.json","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-13270","tags":["web"]},{"url":"https://github.com/advisories/GHSA-wgh9-p42c-pq7h"},{"url":"https://ubuntu.com/security/CVE-2020-13270","tags":["report"]},{"url":"https://about.gitlab.com/releases/2020/05/27/security-release-13-0-1-released/","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-13270","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-13270","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 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API","status":"published","published":"2020-06-10T15:15:13.37Z","modified":"2026-06-17T02:52:49.737Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:06:05.962132Z"}],"osv":[{"id":"CVE-2020-13270","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 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create a fork relation on restricted public projects via API","status":"published","published":"2024-03-06T11:23:10.258Z","modified":"2026-09-10T16:01:31.971524505Z","updated_at":"2026-11-02T15:28:29.999658Z"}]}}