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CVE-2026-31832GHSA-FPVF-FVP5-996R

Umbraco Backoffice API Allows Unauthorized Modification of Domain Data

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 16.5.1, 17.2.0, 17.2.2
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

Umbraco is an ASP.NET CMS. From 14.0.0 to before 16.5.1 and 17.2.2, A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks. The issue is caused by insufficient authorization enforcement on the affected API endpoint, whereby via an API call, domains can be set on content nodes that the editor does not have permission to access (either via user group privileges or start nodes). This vulnerability is fixed in 16.5.1 and 17.2.2.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • umbraco Umbraco-CMS

    From 14.0.0 · fixed in 16.5.1; From 17.0.0 · fixed in 17.2.0

  • Umbraco.CmsNuGet

    From 14.0.0 · fixed in 16.5.1

  • Umbraco.CmsNuGet

    From 17.0.0 · fixed in 17.2.2

References 1

GitHub · umbraco/Umbraco-CMS