CVE-2025-27602: umbraco cms Access Control Flaw — Fix

Description

Umbraco is a free and open source .NET content management system. In versions of Umbraco's web backoffice program prior to versions 10.8.9 and 13.7.1, via manipulation of backoffice API URLs, it's possible for authenticated backoffice users to retrieve or delete content or media held within folders the editor does not have access to. The issue is patched in versions 10.8.9 and 13.7.1. No known workarounds are available.

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CVSS v3.1 Score

4.9

MEDIUM

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

Weakness Type (CWE)

CWE-285 CWE-285

CWE-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
umbraco	umbraco_cms	< 10.8.9
umbraco	umbraco_cms	11.0.0 — 13.7.1

References

Advisories & Patches

https://github.com/umbraco/Umbraco-CMS/commit/5b54bed406682ceff57903bf7d3c57814eef31a7 https://github.com/umbraco/Umbraco-CMS/commit/7888b9a4ce5ae7f9bda7ff3bb705b8fcd2f1675d https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-wx5h-wqfq-v698

Frequently Asked Questions

What is CVE-2025-27602? +

Umbraco is a free and open source .NET content management system. In versions of Umbraco's web backoffice program prior to versions 10.8.9 and 13.7.1, via manipulation of backoffice API URLs, it's possible for authenticated backoffice users to retrieve or delete content or media held within folders the editor does not have access to. The issue is patched in versions 10.8.9 and 13.7.1. No known workarounds are available. It has a CVSS v3.1 base score of 4.9 (MEDIUM).

How severe is CVE-2025-27602? +

CVE-2025-27602 has a CVSS v3.1 score of 4.9 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-2025-27602? +

CVE-2025-27602 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-2025-27602? +

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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