A Coinbase user was likely social engineered and scammed for 110 cbBTC ($11.5M) on Base last month by a threat actor. 

The stolen funds were immediately swapped, bridged, and laundered through multiple instant exchanges and funds consolidated with other Coinbase victims on Ethereum.

Theft transaction hash
0x8639f4b4420d47d68f27dc27967ff62ec913106e5b9ce99011de99b8d91813cd
0xb5895314777776da645529df83cd0d0883ed456e2c81e27c97eb5cf45a59c36b
0xfa26f3917519444c7d3d9ca05fc70b289d44958cb55801b9221d7b492f41c76d

Coinbase social engineering scams have resulted in $150M+ / yr stolen from users due to data breaches, email/call spoofing, bad detection, etc

I was scammed for $300 on base last year ..  this is a very big concern . Coinbase and base team should collect data of phishing  sites  contracts al and addresses and blacklist them to prevent future scams.