CVE-2021-38366: Sitecore

High severity, CVSS 8.8. EPSS: 2.9% chance of exploitation in the next 30 days.

Sitecore through 10.1, when Update Center is enabled, allows remote authenticated users to upload arbitrary files and achieve remote code execution by visiting an uploaded .aspx file at an admin/Packages URL.

Affected products

• Sitecore Sitecore: up to and including 10.1

Published 2021-08-12. Last modified 2026-06-17.