In Kentico before 13.0.66, attackers can achieve Denial of Service via a crafted request to the GetResource handler.

Kentico CMS before 13.0.66 has an Insecure Direct Object Reference vulnerability. It allows an attacker with user management rights (default is Administrator) to export the user options of any user, even ones with higher privileges (like Global Administrators) than the current user. The exported XML contains every option of the exported user (even the hashed password).

Cross Site Scripting (XSS) vulnerability in Kentico before 12.0.75.

Kentico before 12.0.50 allows file uploads in which the Content-Type header is inconsistent with the file extension, leading to XSS.

DISPUTED Kentico 11 through 12 lets attackers upload and explore files without authentication via the cmsmodules/medialibrary/formcontrols/liveselectors/insertimageormedia/tabsmedia.aspx URI. NOTE: The vendor disputes the report because the researcher did not configure the media library permissions correctly. The vendor states that by default all users can read/modify/upload files, and it’s up to the administrator to decide who should have access to the media library and set the permissions accordingly. See the vendor documentation in the references for more information.

Kentico contains a failure to validate security headers. This deserialization can led to unauthenticated remote code execution.

DISPUTED Kentico v10.0.42 allows Global Administrators to read the cleartext SMTP Password by navigating to the SMTP configuration page. NOTE: the vendor considers this a best-practice violation but not a vulnerability. The vendor plans to fix it at a future time.