Hi
Use 3.0.3
What is the main danger? It is possible more in detail? If I use the wallet on a separate laptop without surfing on the Internet, for me there is still a threat?
+ ptotected by password strong
Providing there's a strong password your encrypted seed can be gathered but if the password is 15+ chars it can't be hacked.
It is recommended you upgrade but if you have a password and dont surf the web from that device there shouldn't be too much of a threat.
Encrypted seed cannot be gathered i.e. they cannot get at the cipher text . All they can do is attempt to guess your password via the json rpc interface. That is a slow process so it's not really going to crack any sort of reasonably strong password.