The Quick Edit module does not properly check entity access in some circumstances. This could result in users with the "access in-place editing" permission viewing some content they are are not authorized to access. Sites are only affected if the QuickEdit module (which comes with the Standard profile) is installed. This issue affects versions 8.0.0 through 9.2.12, and 9.3.0 through 9.3.5 and 10.0.0-alpha1.
CWE-863 - Incorrect Authorization
Authorization is a security mechanism performed by an application to grant or deny access to the requested resources by verifying the privileges of the user. When an application lacks effective authorization mechanisms, it enables unauthorized users to gain unintended privileges and illegitimate access to resources. Such a vulnerability may result in exposure of sensitive information, denial of service, arbitrary code execution, and complete system takeover.