{"id":"CVE-2023-37267","aliases":["GHSA-h8wc-r4jh-mg7m"],"url":"https://o3.security/vulnerability/CVE-2023-37267","summary":"Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions","details":"Under rare conditions, a restart of Umbraco can allow unauthorized users to gain admin-level permissions.\n\n### Impact\nAn unauthorized user gaining admin-level access and permissions to the backoffice.\n\n### Patches\n10.6.1, 11.4.2, 12.0.1\n\n### Workarounds\n* Enabling the [Unattended Install](https://docs.umbraco.com/umbraco-cms/reference/configuration/unattendedsettings) feature will mean the vulnerability is not exploitable.\n* Enabling IP restrictions to `*/install/*` and `*/umbraco/*` will limit the exposure to allowed IP addresses.\n","published":"2023-07-13T13:43:59.383Z","modified":"2026-08-12T03:51:42.622652281Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":{"score":0.00715,"percentile":0.52004,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"NuGet","name":"Umbraco.Cms.Infrastructure","fixedVersion":"10.6.1"},{"ecosystem":"NuGet","name":"Umbraco.Cms.Infrastructure","fixedVersion":"11.4.2"},{"ecosystem":"NuGet","name":"Umbraco.Cms.Infrastructure","fixedVersion":"12.0.1"},{"ecosystem":"NuGet","name":"Umbraco.Cms.Web.BackOffice","fixedVersion":"10.6.1"},{"ecosystem":"NuGet","name":"Umbraco.Cms.Web.BackOffice","fixedVersion":"11.4.2"},{"ecosystem":"NuGet","name":"Umbraco.Cms.Web.BackOffice","fixedVersion":"12.0.1"}],"fix":{"url":"https://github.com/umbraco/Umbraco-CMS/commit/1f26f2c6f3428833892cde5c6d8441fb041e410e","label":"umbraco/Umbraco-CMS@1f26f2c"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37267.json"},{"type":"ADVISORY","url":"https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-h8wc-r4jh-mg7m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-37267"},{"type":"FIX","url":"https://github.com/umbraco/Umbraco-CMS/commit/1f26f2c6f3428833892cde5c6d8441fb041e410e"},{"type":"FIX","url":"https://github.com/umbraco/Umbraco-CMS/commit/20a4e475c8d7b91d263e4e103ef19f3644e7b569"},{"type":"FIX","url":"https://github.com/umbraco/Umbraco-CMS/commit/82eae48d098b9deecbdf86cf288b2b18020e1fed"},{"type":"PACKAGE","url":"https://github.com/umbraco/Umbraco-CMS"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.622652281Z"}}