CVE-2020-5811: Authenticated path traversal in Umbraco CMS
6.5
CVSS Score
3.1
Basic Information
CVE ID
GHSA ID
EPSS Score
0.84892%
CWE
Published
4/13/2021
Updated
2/1/2023
KEV Status
No
Technology
C#
Technical Details
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
---|---|---|---|
UmbracoCms | nuget | < 8.9.2 | 8.9.2 |
Vulnerability Intelligence
Miggo AI
Root Cause Analysis
The vulnerability stems from improper path validation during package installation. Key functions identified are:
- PackageController.InstallPackage - Entry point for package installation that would process malicious package.xml
- PackageInstallation.ExtractPackageFiles - Directly handles file extraction logic where path traversal would occur While exact code isn't shown, advisory explicitly states the install process lacked the path containment checks present in uninstall routines. These functions would appear in stack traces when processing malicious package files with '../' in orgPath attributes.