Electrum Bitcoin Wallet Users Told to Update After Fee Bump Theft

TLDR Electrum disclosed a high-risk flaw that let malicious servers redirect Bitcoin payments. The attack worked when users raised fees through Replace-by-Fee. Attackers used addresses with the same last four characters as the real recipient. One user lost funds after approving a fee increase. Version 4.8.3 fixes the problem, and users should update from electrum.org. Electrum has disclosed a high-risk flaw in its Bitcoin wallet software. Malicious servers used it to redirect payments when users raised transaction fees. New release: Electrum 4.8.3. This release fixes a critical security issue, so we urge all users to upgrade.