CVE-2025-27601 json
Umbraco Allows Improper API Access Control to Low-Privilege Users to Data Type Functionality
published last yr. modified 4mo 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
Is CVE-2025-27601 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-09).
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
References
-
github.com
/umbraco/Umbraco-CMS/commit/d9fb6df16e9adf8656181cac8497fc5ba23321cd
web, patch
-
github.com
/umbraco/Umbraco-CMS/commit/ebb6a580dc1da2c772a99838dc7b4660bf77eb9c
web, patch
-
github.com
/umbraco/Umbraco-CMS/security/advisories/GHSA-6ffg-mjg7-585x
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-27601
advisory
-
github.com
/umbraco/Umbraco-CMS
package
Sources
- CVE List CVE-2025-27601
- GitHub Advisory GHSA-6ffg-mjg7-585x
- NVD CVE-2025-27601
Fencer Intel 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.