title: Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions
description: Umbraco is a ASP.NET CMS. Under rare conditions a restart of Umbraco can allow unauthorized users access to admin-level permissions. This vulnerability was patched in versions 10.6.1, 11.4.2 and 12.0.1.
problem types: CWE-284: Improper Access Control
affected:
{
vendor: umbraco
product: Umbraco-CMS
versions:
version: >= 9.0.0, < 10.6.1, status: affected
version: >= 11.0.0, < 11.4.2, status: affected
version: = 12.0.0, status: affected
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
version: 3.1
]