CVE-2023-49089

Using the directory back payload (“/../”) in a package name allows placement of package in other folders.

Explanation of the vulnerability

The “Package” section in Umbraco Backoffice allows a logged in user to write folders outside of the default package directory.

Backoffice users with permissions to create packages can use path traversal and thereby write outside of the expected location.

Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files. Typical impact: unauthorized file read or write outside the intended directory.

Kodem intelligence

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1. What is CVE-2023-49089? CVE-2023-49089 is a low-severity path traversal vulnerability in Umbraco.CMS (nuget), affecting versions >= 8.0.0, < 8.18.10. It is fixed in 8.18.10, 10.8.1, 12.3.4. Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files.
2. Which versions of Umbraco.CMS are affected by CVE-2023-49089? Umbraco.CMS (nuget) versions >= 8.0.0, < 8.18.10 is affected.
3. Is there a fix for CVE-2023-49089? Yes. CVE-2023-49089 is fixed in 8.18.10, 10.8.1, 12.3.4. Upgrade to this version or later.
4. Is CVE-2023-49089 exploitable, and should I be worried? Whether CVE-2023-49089 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
5. What actually determines whether CVE-2023-49089 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
6. How do I fix CVE-2023-49089?
   • Upgrade Umbraco.CMS to 8.18.10 or later
   • Upgrade Umbraco.CMS to 10.8.1 or later
   • Upgrade Umbraco.CMS to 12.3.4 or later

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