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EUVD-2026-222060

fkie_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.

GHSA-wx5h-wqfq-v698 — Umbraco Allows a Restricted Editor User to Delete Media Item or Access Unauthorized Content

Affected: NuGet: Umbraco.Cms.Web.Backoffice

### Impact 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.

### Patches Will be patched in 10.8.9 and 13.7.1

### Workarounds None available.