Marius Steffens is a first-year Ph.D. student at the Secure Web Applications Group at CISPA-Helmholtz Center for Information Security, where Ben Stock supervises him. Marius is currently interested in the area of web security and is looking into the prevalence of vulnerabilities in client-side web applications. Besides that, he is interested in understanding the pitfalls and misconceptions tied to the process of securing modern Web applications.