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Fencer Intel
medium 5.4

CVE-2023-49273 json

Umbraco CMS vulnerable to Privilege Escalation using Spoofing

published 2y ago modified 4mo ago also GHSA-cfr5-7p54-4qg8 , EUVD-2023-3183

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

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 12.3.4, users with low privileges (Editor, etc.) are able to access some unintended endpoints. Versions 8.18.10, 10.8.1, and 12.3.4 contain a patch for this issue.

Patch / fix

  • nuget Umbraco.CMS 8.18.10, 10.8.1, 12.3.4
  • umbraco umbraco_cms 8.18.10, 10.8.1, 12.3.4

Is CVE-2023-49273 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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Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
nuget Umbraco.CMS
>=8.0.0, <8.18.10
>=9.0.0, <10.8.1
>=11.0.0, <12.3.4
8.18.10
10.8.1
12.3.4

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.