GHSA-q62r-8ppj-xvf4: Umbraco.Cms (CVE-2025-32017)

Package	Ecosystem	Affected	Fixed in
Umbraco.Cms	NuGet	>=14.0.0--preview004, <14.3.4 \|\| >=15.0.0-rc1, <15.3.1	14.3.4, 15.3.1

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Umbraco.Cms versions from 14.0.0-preview004 up to 14.3.4 and from 15.0.0-rc1 up to 15.3.1 are vulnerable. An authenticated user of the Umbraco backoffice can send crafted management API requests that use path traversal to upload files to an unintended location. Upgrade to 14.3.4 or 15.3.1. As a workaround, restrict the allowed upload file extensions in the content settings to only those that are necessary.

Written 9 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.8	High	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0065, the 51st percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

8 Apr 2025, 05:09 UTC Published by the maintainers as a GitHub repository advisory
31 Oct 2026, 15:22 UTC First seen by agentprime
31 Oct 2026, 15:22 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.