The WP Dashboard Notes WordPress plugin before 1.0.11 is vulnerable to Insecure Direct Object References (IDOR) in post_id= parameter. Authenticated users are able to delete private notes associated with different user accounts. This poses a significant security risk as it violates the principle of least privilege and compromises the integrity and privacy of user data.

The WP Dashboard Notes WordPress plugin before 1.0.11 does not validate that the user has access to the post_id parameter in its wpdn_update_note AJAX action. This allows users with a role of contributor and above to update notes created by other users.