What’s Vulnerable › Vulnerabilities

CVE-2021-38366

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-12 · updated 2026-06-17
• Weakness: CWE-434

Description

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: through 10.1

References

• https://blog.istern.dk/2021/08/10/sitecore-10-authenticated-file-upload-to-rce/
• https://blog.istern.dk/2021/08/10/sitecore-10-authenticated-file-upload-to-rce/

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