- Millions of people use password managers. They make accessing online services and bank accounts easy and simplify credit card payments.
- Many providers promise absolute security – the data is said to be so encrypted that even the providers themselves cannot access it.
- However, researchers from ETH Zurich have shown that it is possible for hackers to view and even change passwords.



“Properly implemented” is doing the heavy lifting in that sentence.
Four paragraphs down from your quote is this:
If E2EE were properly implemented, the above would be impossible.