The chart says it's been fixed on Qtum. Only the first vulnerability was exploitable. But, as someone said, it's a bit worrying that Qtum kept quiet about this - but, then again, maybe it's best to keep quiet about something like this until everyone has it sorted.

"All these mitigations make the attack difficult to carry out but are still no substitute for full validation. Some cryptocurrencies, such as Qtum, plan to move to full validation of off-main-chain-blocks in future releases."