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Fencer Intel
high 7.5

CVE-2023-37267 json

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

published 3y ago modified 4mo ago also GHSA-h8wc-r4jh-mg7m , EUVD-2023-2073

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

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.

Patch / fix

  • nuget Umbraco.Cms.Infrastructure 10.6.1, 11.4.2, 12.0.1
  • nuget Umbraco.Cms.Web.BackOffice 10.6.1, 11.4.2, 12.0.1
  • umbraco umbraco_cms 10.6.1, 11.4.2, 12.0.1

Is CVE-2023-37267 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2y ago

Exploit prediction

0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget Umbraco.Cms.Infrastructure
>=9.0.0, <10.6.1
>=11.0.0, <11.4.2
>=12.0.0, <12.0.1
10.6.1
11.4.2
12.0.1
nuget Umbraco.Cms.Web.BackOffice
>=9.0.0, <10.6.1
>=11.0.0, <11.4.2
>=12.0.0, <12.0.1
10.6.1
11.4.2
12.0.1

Affected products

  • umbraco Umbraco-CMS

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.