Electrum 4.8.3 Patches Critical Vulnerability That Let Malicious Servers Redirect Bitcoin Payments

Electrum 4.8.3, released Oct 24, patches a critical flaw in prior versions. Malicious servers could redirect payments by substituting a zero-fee transaction with the attacker's address. If users raised the fee, they broadcast a valid payment to the attacker. The patch verifies signatures for wallet inputs before recording unconfirmed transactions. Users should update or manually check addresses.