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TI-2025-20411 Aliases CVE-2025-27601GHSA-6ffg-mjg7-585x

Umbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality

Priority LOW 20CWE-285Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-285.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00323 25th percentileScored 2026-11-07
Fix Fixed Umbraco-CMS (umbraco): 15.2.3, 14.3.3Umbraco.Cms.Api.Management (NuGet): 15.2.3, 14.3.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
umbracoUmbraco-CMS15.0.0-rc1 to before 15.2.3; before 14.3.315.2.3, 14.3.3Patch availableCNA
—Umbraco.Cms.Api.Management (NuGet)15.0.0-rc1 to before 15.2.315.2.3Patch availableGHSA-6ffg-mjg7-585x
—Umbraco.Cms.Api.Management (NuGet)before 14.3.314.3.3Patch availableGHSA-6ffg-mjg7-585x
  • Umbraco-CMS Vendorumbraco Affected 15.0.0-rc1 to before 15.2.3; before 14.3.3 Fixed in 15.2.3, 14.3.3 Patch available CNA
  • Umbraco.Cms.Api.Management (NuGet) Vendor— Affected 15.0.0-rc1 to before 15.2.3 Fixed in 15.2.3 Patch available GHSA-6ffg-mjg7-585x
  • Umbraco.Cms.Api.Management (NuGet) Vendor— Affected before 14.3.3 Fixed in 14.3.3 Patch available GHSA-6ffg-mjg7-585x

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*before 14.3.3; 15.0.0 to before 15.2.3Vulnerableumbraco
  • cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* Versions before 14.3.3; 15.0.0 to before 15.2.3 Vulnerable ·umbraco

Remediation

  • Fix · CNA Umbraco-CMS (umbraco) Fixed in 15.2.3, 14.3.3
  • Fix · GHSA-6ffg-mjg7-585x Umbraco.Cms.Api.Management (NuGet) Fixed in 15.2.3 Advisory →
  • Fix · GHSA-6ffg-mjg7-585x Umbraco.Cms.Api.Management (NuGet) Fixed in 14.3.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-27601
  2. 2026-10-03 Alias added: GHSA-6ffg-mjg7-585x

References

Patch 2

Advisory 2

Other 1

  • TI-2025-41183 An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute… CVSS 3.1CRITICAL 10.0
  • TI-2012-05477 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE CVSS 4.0CRITICAL 9.3
  • TI-2021-22392 Umbraco v8.14.1 - 'baseUrl' SSRF CVSS 4.0MEDIUM 6.9
  • TI-2024-36846 A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers… CVSS 3.1MEDIUM 6.5
  • TI-2019-15240 Umbraco CMS 4.11.8 through 7.15.10, and 7.12.4, allows Remote Code Execution by… CVSS 3.1HIGH 7.2
  • TI-2020-04738 Cross-site scripting in Umbraco CMS CVSS 3.1MEDIUM 5.4
See all 56 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences