CVE-2025-27601 Umbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality
Low-privilege users can modify restricted data type settings due to improper API access control in Umbraco CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-27601?
CVE-2025-27601 is a medium-severity missing authorization vulnerability in Umbraco Umbraco Cms, published on 11 Mar 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Umbraco is a free and open source .NET content management system. An improper API access control issue has been identified Umbraco's API management package prior to versions 15.2.3 and 14.3.3, allowing low-privilege, authenticated users to create and update data type information that should be restricted to users with access to the settings section. The issue is patched in versions 15.2.3 and 14.3.3. No known workarounds are available.
Which versions are affected by CVE-2025-27601?
4 open source packages ship an affected version, including Umbraco.Cms.Api.Management. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Umbraco.Cms.Api.Management NuGet | All versions | 14.3.3 |
Umbraco.Cms.Api.Management NuGet | All versions | 14.3.3 |
Umbraco.Cms.Api.Management NuGet | From 15.0.0-rc1 | 15.2.3 |
Umbraco.Cms.Api.Management NuGet | From 15.0.0-rc1 | 15.2.3 |
Products include Umbraco Umbraco Cms.
How do I fix CVE-2025-27601?
Upgrade Umbraco.Cms.Api.Management to a fixed version for your release line: 14.3.3 or 15.2.3.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-27601 being exploited?
There is no known exploitation of CVE-2025-27601 in the wild and no public exploit code.
Other vulnerabilities in Umbraco Umbraco Cms
- CVE-2025-67288 Umbraco CMS has an arbitrary file upload vulnerability
- CVE-2014-10074 File upload in n/a
- CVE-2012-1301 Server-side request forgery in n/a
- CVE-2012-10054 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE
- CVE-2025-32017 Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users
Sources
Also known as GHSA-6ffg-mjg7-585x.