Skip to content
Fencer Vulns
medium 4.3

CVE-2025-27601 json

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

published 2025-03-11 19 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-7794 , GHSA-6ffg-mjg7-585x

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

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.

Patch / fix

  • nuget Umbraco.Cms.Api.Management 14.3.3, 15.2.3
  • umbraco umbraco_cms 14.3.3, 15.2.3

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
19 mo ago

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
nuget Umbraco.Cms.Api.Management
>=15.0.0-rc1, <15.2.3
<14.3.3
15.2.3
14.3.3

Affected products

  • umbraco Umbraco-CMS

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.