Web applications are very important to many organisations. For example, online shops are completely dependent on these applications for the smooth and secure operation of their site. These applications are obviously used for many other purposes, such as online banking, government communication, viewing educational results or booking hospital appointments.
Websites that allow a user to login to view personal and privacy sensitive information are especially vulnerable. While the access to these websites is usually well secured, things can go wrong after a user has logged in and suddenly become able to view or even alter someone else's data.