What is CVE-2023-37267?

CVE-2023-37267 is a high-severity security vulnerability in Umbraco.Cms.Infrastructure (nuget), affecting versions >= 9.0.0, < 10.6.1. It is fixed in 10.6.1, 11.4.2, 12.0.1.

How severe is CVE-2023-37267?

CVE-2023-37267 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which packages are affected by CVE-2023-37267?

Umbraco.Cms.Infrastructure (nuget) versions >= 9.0.0, = 9.0.0, < 10.6.1.

Is there a fix for CVE-2023-37267?

Yes. CVE-2023-37267 is fixed in 10.6.1, 11.4.2, 12.0.1. Upgrade to this version or later.

Is CVE-2023-37267 exploitable, and should I be worried?

Whether CVE-2023-37267 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.

What actually determines whether CVE-2023-37267 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.

How do I fix CVE-2023-37267?

Upgrade: Umbraco.Cms.Infrastructure to 10.6.1 or later, Umbraco.Cms.Infrastructure to 11.4.2 or later, Umbraco.Cms.Infrastructure to 12.0.1 or later, Umbraco.Cms.Web.BackOffice to 10.6.1 or later, Umbraco.Cms.Web.BackOffice to 11.4.2 or later, Umbraco.Cms.Web.BackOffice to 12.0.1 or later.

CVE-2023-37267 in Umbraco.Cms.Infrastructure

Q: How severe is CVE-2023-37267?

CVE-2023-37267 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which packages are affected by CVE-2023-37267?

Umbraco.Cms.Infrastructure (nuget) versions >= 9.0.0, = 9.0.0, < 10.6.1.

Q: Is there a fix for CVE-2023-37267?

Yes. CVE-2023-37267 is fixed in 10.6.1, 11.4.2, 12.0.1. Upgrade to this version or later.

Q: Is CVE-2023-37267 exploitable, and should I be worried?

Whether CVE-2023-37267 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.

Q: What actually determines whether CVE-2023-37267 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.

Q: How do I fix CVE-2023-37267?

Upgrade: Umbraco.Cms.Infrastructure to 10.6.1 or later, Umbraco.Cms.Infrastructure to 11.4.2 or later, Umbraco.Cms.Infrastructure to 12.0.1 or later, Umbraco.Cms.Web.BackOffice to 10.6.1 or later, Umbraco.Cms.Web.BackOffice to 11.4.2 or later, Umbraco.Cms.Web.BackOffice to 12.0.1 or later.

Summary

Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions

Under rare conditions, a restart of Umbraco can allow unauthorized users to gain admin-level permissions.

Workarounds

Enabling the Unattended Install feature will mean the vulnerability is not exploitable.
Enabling IP restrictions to */install/* and */umbraco/* will limit the exposure to allowed IP addresses.

Impact

An unauthorized user gaining admin-level access and permissions to the backoffice.

CVE-2023-37267 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (10.6.1, 11.4.2, 12.0.1); upgrading removes the vulnerable code path.

Affected versions

Umbraco.Cms.Infrastructure (>= 9.0.0, < 10.6.1) Umbraco.Cms.Infrastructure (>= 11.0.0, < 11.4.2) Umbraco.Cms.Infrastructure (= 12.0.0) Umbraco.Cms.Web.BackOffice (>= 9.0.0, < 10.6.1) Umbraco.Cms.Web.BackOffice (>= 11.0.0, < 11.4.2) Umbraco.Cms.Web.BackOffice (= 12.0.0)

Security releases

Umbraco.Cms.Infrastructure → 10.6.1 (nuget) Umbraco.Cms.Infrastructure → 11.4.2 (nuget) Umbraco.Cms.Infrastructure → 12.0.1 (nuget) Umbraco.Cms.Web.BackOffice → 10.6.1 (nuget) Umbraco.Cms.Web.BackOffice → 11.4.2 (nuget) Umbraco.Cms.Web.BackOffice → 12.0.1 (nuget)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

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. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

10.6.1, 11.4.2, 12.0.1

Frequently Asked Questions

What is CVE-2023-37267? CVE-2023-37267 is a high-severity security vulnerability in Umbraco.Cms.Infrastructure (nuget), affecting versions >= 9.0.0, < 10.6.1. It is fixed in 10.6.1, 11.4.2, 12.0.1.
How severe is CVE-2023-37267? CVE-2023-37267 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which packages are affected by CVE-2023-37267?
- Umbraco.Cms.Infrastructure (nuget) (versions >= 9.0.0, < 10.6.1)
- Umbraco.Cms.Web.BackOffice (nuget) (versions >= 9.0.0, < 10.6.1)
Is there a fix for CVE-2023-37267? Yes. CVE-2023-37267 is fixed in 10.6.1, 11.4.2, 12.0.1. Upgrade to this version or later.
Is CVE-2023-37267 exploitable, and should I be worried? Whether CVE-2023-37267 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
What actually determines whether CVE-2023-37267 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.
How do I fix CVE-2023-37267?
- Upgrade Umbraco.Cms.Infrastructure to 10.6.1 or later
- Upgrade Umbraco.Cms.Infrastructure to 11.4.2 or later
- Upgrade Umbraco.Cms.Infrastructure to 12.0.1 or later
- Upgrade Umbraco.Cms.Web.BackOffice to 10.6.1 or later
- Upgrade Umbraco.Cms.Web.BackOffice to 11.4.2 or later
- Upgrade Umbraco.Cms.Web.BackOffice to 12.0.1 or later