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CVE-2023-37267: Possible admin-level access to backoffice without authentication under rare conditions

Umbraco is a ASP.NET CMS. Under rare conditions a restart of Umbraco can allow unauthorized users access to admin-level permissions. This vulnerability was patched in versions 10.6.1, 11.4.2 and 12.0.1.

CVE
#vulnerability#auth#asp.net

Package

nuget Umbraco.Cms (NuGet)

Affected versions

> 9.0.0

Patched versions

10.6.1, 11.4.2, 12.0.1

Description

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

Impact

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

Patches

10.6.1, 11.4.2, 12.0.1

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.

Related news

GHSA-h8wc-r4jh-mg7m: 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. ### Impact An unauthorized user gaining admin-level access and permissions to the backoffice. ### Patches 10.6.1, 11.4.2, 12.0.1 ### Workarounds * Enabling the [Unattended Install](https://docs.umbraco.com/umbraco-cms/reference/configuration/unattendedsettings) feature will mean the vulnerability is not exploitable. * Enabling IP restrictions to `*/install/*` and `*/umbraco/*` will limit the exposure to allowed IP addresses.

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