CRITICAL10.0

GHSA-54mj-vcvj-q3v5

Umbraco CMS has an arbitrary file upload vulnerability

Details

An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code via uploading a crafted PDF file. While Umbraco provides [hooks to perform file validation](https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation), it does not do implement filtering by default. Users are expected to implement their own validation.

Note: This vulnerability is [disputed by Ubraco](https://github.com/github/advisory-database/pull/6633).

Are you affected?

Enter the version of the package you're using.

Affected packages

NuGet/Umbraco.Cms

Introduced in: 0

No fixed version published yet for Umbraco.Cms (nuget). Pin to a known-safe version or switch to an alternative.

References

https://nvd.nist.gov/vuln/detail/CVE-2025-67288[ADVISORY]
https://github.com/github/advisory-database/pull/6633[WEB]
https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation[WEB]
https://github.com/umbraco/Umbraco-CMS[PACKAGE]
https://github.com/vuquyen03/CVE/tree/main/CVE-2025-67288[WEB]
http://umbraco.com[WEB]