CVE-2026-31833

MEDIUM

6.7

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung6.7

SchweregradMEDIUM

CVSS VektorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienHIGH

BenutzerinteraktionNONE

Veroffentlicht3/10/2026

Zuletzt geandert3/18/2026

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

umbraco:umbraco_cms

Schwachen (CWE)

CWE-79

Referenzen

https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-vrqc-59mw-qqg7(security-advisories@github.com)

IOC Korrelationen

Keine Korrelationen erfasst

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