One of the most often used keyboard shortcuts is Ctrl + X or Ctrl + C which puts the text or image selected in the clipboard selection. This is a really helpful when you are trying to move or copy data from one place to another. But the same text / image can be misused by someone for stealing your information when you visit their website.
Its going to be a very rare case where someone can just use your single piece of information like this but you can be tricked into doing this. So just take care while using these shortcuts with sensitive information such as your credit card, passwords, pin, etc.
If you want to check out how this works, just use Ctrl + C by selecting any text on this page and visit this link
This issue is a bug with IE but can be fixed by following these simple steps:
a) Go to Tools -> Internet Options -> Security
b) Click on Custom Level
c) In the security settings, click to Disable the “Allow Paste Operations via Script.â€