CVEvulnerability

CVE-2026-31833

6.7 MEDIUM 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])
6.7 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
Weaknesses
CWE-79

Description

Umbraco is an ASP.NET CMS. From 16.2.0 to before 16.5.1 and 17.2.2, An authenticated backoffice user with access to Settings can inject malicious HTML into property type descriptions. Due to an overly permissive attributeNameCheck configuration (/.+/) in the UFM DOMPurify instance, event handler attributes such as onclick and onload, when used within Umbraco web components (umb-*, uui-*, ufm-*) were not filtered. This vulnerability is fixed in 16.5.1 and 17.2.2.

Affected configurations

• umbraco umbraco cms (>= 16.2.0 < 16.5.1) • umbraco umbraco cms (>= 17.0.0 < 17.2.2)

Related

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References