paymentrequest.py in Electrum before 4.2.2 allows a file:// URL in the r parameter of a payment request (e.g., within QR code data). On Windows, this can lead to capture of credentials over SMB. On Linux and UNIX, it can lead to a denial of service by specifying the /dev/zero filename.
Date published : 2022-06-17
Electrum 4.2.2 fixes a vulnerability that can be exploited on some Windows+SMB configurations. Please upgrade if you have not done so already. More details here:https://t.co/xn2bWQQkIZ
— Electrum (@ElectrumWallet) June 8, 2022