this post was submitted on 14 Sep 2024
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It seemed odd to me that a Web site could write to or read from the clipboard without the user approving it. That would be a pretty obvious security and privacy issue. From what I gather, on Chrome sites can write to the clipboard without approval, but they need approval to read. ~~On Firefox and others any access requires permission. Thus this exploit seems limited to Chrome users.~~
@SkaveRat pointed out that it doesn't require permission, only interaction. So likely there's a button that's clicked that writes to the clipboard, and most browsers are susceptible to this.
not when there was a user intent like clicking a button.
For example in this screenshot, it's likely that there's only the "verify I'm human" button first, you click it, the steps pop up, and at the same time the command ist copied into your clipboard
Exactly, copy requires a click but there's no rule that the copy button has to look like anything particular
It doesn't necessarily need a click - it can be triggered by a keypress too (eg at my workplace we have a few internal pages where you can press a keyboard shortcut to copy a shortened URL for the current page).
It has to be something the browser considers a user interaction, meaning the user has expressed an intent to perform the action. That's usually a button press or keypress.