Umbraco, a free and open source .NET content management system, has an improper access control issue starting in version 14.0.0 and prior to version 14.3.0. The issue allows low-privilege users to access the webhook API and retrieve information that should be restricted to users with access to the settings section. Version 14.3.0 contains a patch.
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-4gp9-ff99-j6vj