CVE-2025-27601
Umbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Umbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality
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.
- Record
CVE-2025-27601- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-285, CWE-863
- Updated
- 2026-11-02
EUVDEUVD-2025-7794
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.
- Record
EUVD-2025-7794- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6ffg-mjg7-585x
Umbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality
Impact
An improper API access control issue has been identified, allowing low-privilege, authenticated users to create and update data type information that should be restricted to users with access to the settings section.
Patches
Will be patched in 14.3.3 and 15.2.3.
Workarounds
None available.
- Record
GHSA-6ffg-mjg7-585x- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-285, CWE-863
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-27601- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-285, CWE-863
- Updated
- 2026-11-02
OSV
Umbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality
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.
- Record
CVE-2025-27601- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-285, CWE-863
- Updated
- 2026-11-02
OSVGHSA-6ffg-mjg7-585x
Umbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality
Impact
An improper API access control issue has been identified, allowing low-privilege, authenticated users to create and update data type information that should be restricted to users with access to the settings section.
Patches
Will be patched in 14.3.3 and 15.2.3.
Workarounds
None available.
- Record
GHSA-6ffg-mjg7-585x- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-285, CWE-863
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
Umbraco.Cms.Api.ManagementNuGet |
15.0.0-rc1 to 15.2.2 | 15.2.3 |
Umbraco.Cms.Api.ManagementNuGet |
through 14.3.2 | 14.3.3 |
Umbraco.Cms.Api.ManagementNuGet |
15.0.0-rc1 up to 15.2.3, plus listed versions 15.0.015.0.0-rc215.0.0-rc315.0.0-rc415.1.0 Show 8 moreShow less15.1.0-rc15.1.0-rc215.1.115.1.215.2.015.2.0-rc15.2.115.2.2 |
15.2.3 |
Umbraco.Cms.Api.ManagementNuGet |
before 14.3.3, plus listed versions 14.0.014.0.0-rc114.0.0-rc214.0.0-rc314.0.0-rc4 Show 14 moreShow less14.0.0-rc514.1.014.1.0-rc14.1.0-rc214.1.114.1.214.2.014.2.0-rc14.2.0-rc214.2.0-rc314.3.014.3.0-rc14.3.114.3.2 |
14.3.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-27601 is a medium vulnerability (CVSS 4.3) in Umbraco Umbraco-cms, published March 11, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 25th percentile. Fixed in Umbraco.Cms.Api.Management 15.2.3.
References
github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-6ffg-mjg7-585x
nvd.nist.gov/vuln/detail/CVE-2025-27601