The user_token authorization header on the Ourphoto App version 1.4.1 /apiv1/* end-points is not implemented properly. Removing the value causes all requests to succeed, bypassing authorization and session management. The impact of this vulnerability allows an attacker POST api calls with other users unique identifiers and enumerate information of all other end-users.
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.