I’m harvesting credit card numbers and passwords from your site. Here’s how.

This is a “what if?” scenario, but it’s all too plausible.

For site owners, the (partial) solution is to have a strong Content Security Policy.

For users, the solution is to disable JavaScript.

(In the wake of Spectre and Meltdown, this is now a perfectly legitimate action for security-conscious web users to take; I hope your site can support that.)

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