AIKIDO-2026-115380
Umbraco.Cms is vulnerable to Missing Authorization
65
Medium Risk
This Affects:
Umbraco.CmsTL;DR
Umbraco.Cms Management API indexer and searcher endpoints require only an authenticated backoffice user and skip the Settings-section authorization check used by comparable administrative endpoints. Results are not limited to the caller's content, media, or member permissions. A lowest-privilege backoffice user, including one restricted to a single content branch, can read unpublished content, Public Access-protected content, and member records including sensitive data. The fix requires Settings-section access on those routes and additionally requires Members-section access to query member indexes.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
Umbraco.Cms is vulnerable to Missing Authorization in versions 14.0.0 - 17.6.1 and 18.0.0 - 18.1.0.
How to fix this
Upgrade the Umbraco.Cms library to the patch version.
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ISO 27001CompliantISO 42001Compliant
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