Using the directory back payload (“/../”) in a package name allows placement of package in other folders.
Impact
Backoffice users with permissions to create packages can use path traversal and thereby write outside of the expected location.
Explanation of the vulnerability
The “Package” section in Umbraco Backoffice allows a logged in user to write folders outside of the default package directory.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Umbraco.CMS | >= 8.0.0, < 8.18.10, >= 9.0.0, < 10.8.1, >= 11.0.0, < 12.3.4 | 8.18.10, 10.8.1, 12.3.4 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:N- Weakness (CWE)
CWE-22- Platform
- .NET (NuGet)
- Package
Umbraco.CMS- Disclosed
- 13.12.2023
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-6324-52pr-h4p5 - CC BY 4.0
Vulnerability history: Umbraco.CMS
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
- 29
- First → latest
- 05.2022 09.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 5
- Medium 17
- Low 7
Disclosures per year
- 2022: 2
- 2023: 8
- 2024: 5
- 2025: 8
- 2026: 6
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Using the directory back payload (“/../”) in a package name allows placement of package in other folders. this entry
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