How can a third party spend BCH accidentally sent to a BTC address?

How can a third party spend BCH accidentally sent to a BTC address?

I transferred bch to an electrum wallet address and haven't ever received it because electrum uses only btc. As I have been trying to recover it I looked up the transaction on explorer.bitcoin.com and it was input but has also been output 5 times and the balance shows 0. So it would appear that someone has access. How is that possible? Shouldn't it be secure? Do I have any sort of recourse?

https://ift.tt/2pwwO6U

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