CVE-2023-49089
Umbraco CMS possible path traversal when creating packages from backoffice
Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.0, Backoffice users with permissions to create packages can use path traversal and thereby write outside of the expected location. Versions 8.18.10, 10.8.1, and 12.3.0 contain a patch for this issue.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Umbraco CMS possible path traversal when creating packages from backoffice
Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.0, Backoffice users with permissions to create packages can use path traversal and thereby write outside of the expected location. Versions 8.18.10, 10.8.1, and 12.3.0 contain a patch for this issue.
- Record
CVE-2023-49089- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2023-3121
Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.0, Backoffice users with permissions to create packages can use path traversal and thereby write outside of the expected location. Versions 8.18.10, 10.8.1, and 12.3.0 contain a patch for this issue.
- Record
EUVD-2023-3121- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6324-52pr-h4p5
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.
- Record
GHSA-6324-52pr-h4p5- CVSS 3.1
- 0.0 None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
NVD
Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.0, Backoffice users with permissions to create packages can use path traversal and thereby write outside of the expected location. Versions 8.18.10, 10.8.1, and 12.3.0 contain a patch for this issue.
- Record
CVE-2023-49089- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
Umbraco CMS possible path traversal when creating packages from backoffice
Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.0, Backoffice users with permissions to create packages can use path traversal and thereby write outside of the expected location. Versions 8.18.10, 10.8.1, and 12.3.0 contain a patch for this issue.
- Record
CVE-2023-49089- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSVGHSA-6324-52pr-h4p5
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.
- Record
GHSA-6324-52pr-h4p5- CVSS 3.1
- 0.0 None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
Umbraco.CMSNuGet |
8.0.0 up to 8.18.10 | 8.18.10 |
Umbraco.CMSNuGet |
9.0.0 up to 10.8.1 | 10.8.1 |
Umbraco.CMSNuGet |
11.0.0 up to 12.3.4 | 12.3.4 |
Umbraco.CMSNuGet |
9.0.0 up to 10.8.1, plus listed versions 10.0.010.0.0-rc110.0.0-rc210.0.0-rc310.0.0-rc4 Show 45 moreShow less10.0.0-rc510.0.110.1.010.1.0-rc10.1.0-rc210.1.110.2.010.2.0-rc10.2.110.3.010.3.0-rc10.3.110.3.210.4.010.4.0-rc10.4.110.4.210.5.010.5.0-rc10.5.110.6.010.6.0-rc10.6.110.7.010.7.0-rc10.8.010.8.0-rc9.0.19.1.09.1.0-rc9.1.19.1.29.2.09.2.0-rc9.3.09.3.0-rc9.3.19.4.09.4.0-rc9.4.19.4.29.4.39.5.09.5.0-rc9.5.0-rc2 |
10.8.1 |
Umbraco.CMSNuGet |
11.0.0 up to 12.3.4, plus listed versions 11.1.011.1.0-rc11.2.011.2.0-rc11.2.1 Show 28 moreShow less11.2.211.3.011.3.0-rc11.3.111.4.011.4.0-rc11.4.111.4.211.5.011.5.0-rc12.0.012.0.0-rc112.0.0-rc212.0.0-rc312.0.0-rc412.0.0-rc512.0.112.1.012.1.0-rc12.1.112.1.212.2.012.2.0-rc12.3.012.3.0-rc12.3.112.3.212.3.3 |
12.3.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-49089 is a high vulnerability (CVSS 7.7) in Umbraco Cms, published December 12, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.62%, the 50th percentile. Fixed in Umbraco.CMS 8.18.10.
References
Left out here: 5 versions. The JSON record has them.