CVE-2026-31834

HIGH

7.2

Description

Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability has been identified in Umbraco CMS. Under certain conditions, authenticated backoffice users with permission to manage users, may be able to elevate their privileges due to insufficient authorization enforcement when modifying user group memberships. The affected functionality does not properly validate whether a user has sufficient privileges to assign highly privileged roles. This vulnerability is fixed in 16.5.1 and 17.2.2.

Details CVE

Score CVSS v3.17.2

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisHIGH

Interaction utilisateurNONE

Publie3/10/2026

Derniere modification3/18/2026

Sourcenvd

Observations honeypot0

Produits affectes

umbraco:umbraco_cms

Faiblesses (CWE)

CWE-269CWE-284CWE-862

References

https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-rhcg-3h8r-v6vp(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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