Medium
Unrestricted Upload of File with Dangerous Type in Umbraco CMS
Umbraco CMS 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Package functionality.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | UmbracoCms | < 8.5.4 | 8.5.4 |
References
CVSS score
6.5/10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-434- Platform
- .NET (NuGet)
- Package
UmbracoCms- Disclosed
- 02.08.2021
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-j66f-h9hm-975m - CC BY 4.0
Vulnerability history: UmbracoCms
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 04.2021 01.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Medium 6
- Low 1
Disclosures per year
- 2021: 3
- 2022: 0
- 2023: 0
- 2024: 3
- 2025: 0
- 2026: 1
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Unrestricted Upload of File with Dangerous Type in Umbraco CMS this entry
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