CVE-2026-31832
Umbraco Backoffice API Allows Unauthorized Modification of Domain Data
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
Umbraco is an ASP.NET CMS. From 14.0.0 to before 16.5.1 and 17.2.2, A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks. The issue is caused by insufficient authorization enforcement on the affected API endpoint, whereby via an API call, domains can be set on content nodes that the editor does not have permission to access (either via user group privileges or start nodes). This vulnerability is fixed in 16.5.1 and 17.2.2.
| CWE | CWE-639 |
| Vendor | umbraco |
| Product | umbraco-cms |
| Published | Mar 10, 2026 |
| Last Updated | Mar 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
umbraco / Umbraco-CMS
>= 14.0.0, < 16.5.1 >= 17.0.0, < 17.2.0