Spotted this on bitcointalk.
Source: https://bitcointalk.org/index.php?topic=2702103.0
A vulnerability was found in the Electrum wallet software which potentially allows random websites to steal your wallet via JavaScript. The bug presumably also affects altcoin derivatives of Electrum such as Electron Cash. If you don't use Electrum or a derivative, then you are not affected and you can ignore this.
Source: https://bitcointalk.org/index.php?topic=2702103.0