5
“If this result holds up under peer review, it would indeed be a conceptual break-through,” Karsten Nohl, a cryptography expert and the head of innovation at Allurity, said in an interview.
Emphasis mine. It's also only problematic for blind-signature types.
The attack works only against blind-signature implementations of RSA. The overwhelming majority of RSA in use today provides PKCS or PSS padding, a format that adds data to the plaintext before it’s encrypted.
So even if it passes peer review, it's only an issue for older implementations.