CVE-2025-27601: umbraco cms Access Control Flaw — Fix

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.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-285 CWE-285

CWE-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
umbraco	umbraco_cms	< 14.3.3
umbraco	umbraco_cms	15.0.0 — 15.2.3

References

Advisories & Patches

https://github.com/umbraco/Umbraco-CMS/commit/d9fb6df16e9adf8656181cac8497fc5ba23321cd https://github.com/umbraco/Umbraco-CMS/commit/ebb6a580dc1da2c772a99838dc7b4660bf77eb9c

Other References

https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-6ffg-mjg7-585x

Frequently Asked Questions

What is CVE-2025-27601? +

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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-27601? +

CVE-2025-27601 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-27601? +

CVE-2025-27601 affects products from umbraco, specifically: umbraco_cms. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-27601? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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