In recent years, the use of caching techniques in web applications has increased significantly, in line with their expanding user base. The logic of web caches is closely tied to the application logic, and misconfigurations can lead to security risks, including the unauthorized access of private information and session hijacking. In this study, we examine Web Cache Deception as a technique for attacking web applications. We develop a solution for discovering vulnerabilities that expands upon and encompasses prior research in the field. We conducted an experimental evaluation of the attack's efficacy against real-world targets, and present a new attack vector via web-client-based email services.