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Umbraco
October 2025: Umbraco 17 went to beta and uSync closed the v16 line
Umbraco 17 shipped as a beta on 15 October with the final set for 27 November, and uSync 16.1.0 was declared the last feature release for v16. What that costs a site still on 13.
Umbraco
September 2025: the MCP server moved in-house and Smidge needed a patch
Umbraco's September 2025: a security patch for Umbraco 13 through the Smidge dependency, the Developer MCP Server beta moving into Umbraco's own namespace, two uSync patches, and the 2026 price list read after the fact.
Umbraco
August 2025: agents got write access to the backoffice
Four of the month's eleven Umbraco items are about MCP and AI. An agent built an element type from a single prompt, Umbraco Commerce got an MCP proof-of-concept, and the only post that said anything about who should be allowed to do that was a uSync patch note.
Umbraco
July 2025: the Delivery API cache that forgot to check the API key
A moderate-severity Content Delivery API advisory patched in 13.9.3, 15.4.4 and 16.1.1; three uSync releases in nine days, all of it v13 upgrade debt; and Umbraco's roadmap post on MCP, Compose and search.
Umbraco
June 2025: Codegarden filled the roadmap and Umbraco 10 ran out of free patches
Two moderate advisories, the last public patch for Umbraco 10, uSync moving development to v16, and Codegarden announcements that mostly land after the v17 LTS.
Umbraco
May 2025: the patch you could not apply until you upgraded first
Umbraco's 6 May advisory fixed a moderate user-enumeration issue in 10.x and 13.x, but the patch only exists on the latest minor. Plus ContentAudit, uSync 15.1.8 and the v16 release candidate.
Umbraco
April 2025: the advisory got worse three days after the patch shipped
Umbraco patched CMS 14 and 15 on April 8 and raised the severity from moderate to high on April 11. Plus Canadian hosting, Flexible Environments, SSO, and uSync 15.1.6.
Umbraco
March 2025: the Umbraco patch you could not apply where you stood
March's advisory fixed two moderate CMS issues plus a high-severity ImageSharp CVE, but only on the latest minor of each supported major. Also: uSync 13.2.7 and 15.1.5, a V8-to-V13 upgrade written up honestly, and a backoffice accessibility fix.