https://bitcoinsv.io/2019/12/23/bitcoin-sv-blocking-potential-p2sh-replay-attack-after-genesis-hard-fork/

Nullc is Greg Maxwell, who has once again shot him self in the foot.

It should be obvious that Greg has failed to find and exploit as he could have made responsible disclosure and received 100k usd as shown here on the BSV security website:

https://bitcoinsv.io/security/

But no, he made an anonymous reddit post for his bitcointalk bots to boost about.