Malicious Electrum servers substituted attacker payments into wallet history, then relied on users signing a fee bump to send the funds…
Malicious Electrum servers substituted attacker payments into wallet history, then relied on users signing a fee bump to send the funds. Electrum 4.8.3 checks wallet-input signatures before accepting those unconfirmed transactions. https://defiprime.com/electrum-fee-bump-server-attack
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