title: Umbraco CMS vulnerable to possible injection of HTML in an unintended form
description: Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.7.0, and 12.1.0, a user with access to a specific part of the backoffice is able to inject HTML code into a form where it is not intended. Versions 8.18.10, 10.7.0, and 12.1.0 contain a patch for this issue.
problem types: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
affected:
{
vendor: umbraco
product: Umbraco-CMS
versions:
version: >= 8.0.0, < 8.18.10, status: affected
version: >= 9.0.0-rc001, < 10.7.0, status: affected
version: >= 11.0.0-rc1, < 12.1.0, status: affected
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 3.5
baseSeverity: LOW
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: HIGH
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
version: 3.1
]