There's another round of mass SQL injections going on which has infected hundreds of thousands of websites. Performing a Google search results in over 510,000 modified pages. As more and more websites are using database back-ends to make them faster and more dynamic, it also means that it's crucial to verify what information gets stored in or requested from those databases — especially if you allow users to upload content themselves which happens all the time in discussion forums, blogs, feedback forms, et cetera. Unless that data is sanitized before it gets saved you can't control what the website will...