Google has launched a new site that tracks cross-site leaks. It helps to warn users that certain sites utilize such flaws to steal data about the user or similar data from various other web applications. The latest wiki contains data on the steps and principles behind the common attacks, cross-site attacks and suggests defense measures to avoid such attacks. It explains that XSLeaks are a category of liabilities derived from side-channels embedded in the web platform.
The liabilities take advantage of the core principle of composability in the web; it allows websites to communicate with each other and manipulate legitimate measures to gather data regarding the user.