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Same applies, same for chain keys generated in BTCPay. An attacker could glean all your deets.

Ive patched the main btcpayserver container to 2.4.2

Are you referring to the hot wallet mainnet keys?

Id like to know more about the actual exposure here -- CLN uses a unix socket for RPC. There are no creds between CLN and BTCPayServer. There is nothing to rotate there.

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Yes if you have hotwallet keys in BTCPay itself

Unix socket should be ok since there's no creds like you said, would apply more to CLN REST etc