CVEvulnerability

CVE-2026-31834

7.2 HIGH Published 2026-03-10 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-03-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-269, CWE-284, CWE-862

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.

Affected configurations

• umbraco umbraco cms (>= 15.3.1 < 16.5.1) • umbraco umbraco cms (>= 17.0.0 < 17.2.2)

Related

Weakness · CWE (3)

  • CWE-269 Improper Privilege Management weakness
  • CWE-284 Improper Access Control weakness
  • CWE-862 Missing Authorization weakness

References