AIKIDO-2025-10158
Umbraco.Cms.Web.Backoffice is vulnerable to Exposure of Sensitive Information to an Unauthorized Actor
49
Medium Risk
This Affects:
Umbraco.Cms.Web.BackofficeTL;DR
Authenticated backoffice users can exploit manipulated API URLs to bypass access restrictions, allowing them to retrieve or delete content and media stored in folders they are not authorized to access.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
Umbraco.Cms.Web.Backoffice is vulnerable to Exposure of Sensitive Information to an Unauthorized Actor in versions 9.0.0 - 10.8.8, 11.0.0 - 13.7.0, 14.0.0 - 14.3.2 and 15.0.0 - 15.2.2.
How to fix this
Upgrade the Umbraco.Cms.Web.Backoffice library to the patch version.
Links
GitHub Release
Fix Commits
github.com/umbraco/Umbraco-CMS/commit/5b54bed406682ceff57903bf7d3c57814eef31a7github.com/umbraco/Umbraco-CMS/commit/7888b9a4ce5ae7f9bda7ff3bb705b8fcd2f1675d
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SOC 2Compliant
ISO 27001Compliant