๐Ÿ›ก๏ธ CVE-2026-31833
๐ŸŸก CVSS 6.7 โ€” Medium โœ… No Known Exploit CWE-79 NVD
6.7
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 6.7
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
CWE CWE-79
Public Exploit โœ… No
Source NVD
Published 2026-03-10
Updated 2026-06-15
Modified 2026-03-18
Fix URL N/A

Affected Packages

Software From version Fixed in
umbraco-cms 17.0.0 17.2.2
umbraco.cms 17.0.0 17.2.2

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