MEDIUM6.5

GHSA-936x-wgqv-hhgq

Authenticated path traversal in Umbraco CMS

Quick fix

GHSA-936x-wgqv-hhgq — UmbracoCms: upgrade to the fixed version with the command below.

dotnet add package UmbracoCms --version 8.9.2

Details

An authenticated path traversal vulnerability exists during package installation in Umbraco CMS <= 8.9.1 or current, which could result in arbitrary files being written outside of the site home and expected paths when installing an Umbraco package.

Are you affected?

Enter the version of the package you're using.

Affected packages

NuGet/UmbracoCms

Introduced in: 0Fixed in: 8.9.2

Fixdotnet add package UmbracoCms --version 8.9.2

References

https://nvd.nist.gov/vuln/detail/CVE-2020-5811[ADVISORY]
https://www.tenable.com/security/research/tra-2020-59[WEB]
http://packetstormsecurity.com/files/163965/Umbraco-CMS-8.9.1-Traversal-Arbitrary-File-Write.html[WEB]