Thanks for the answers, I found some articels saying that this was an old issue and only pre 2013-2015 generated adresses are affected by this....

https://www.bleepingcomputer.com/news/security/old-javascript-crypto-flaw-puts-bitcoin-funds-at-risk/
https://www.google.ch/amp/s/www.theregister.co.uk/AMP/2018/04/12/javascript_crypto_library_fingered_for_weak_wallets/

But im still not sure about it, very hard to find a clear answer about this :/