This was shared a few minutes ago on Twitter: http://satoshibox.com/j5tc6hwdbp2tbs2z4h8uhcxs
I don't know if it actually works and I don't have 0.05 BTC to test it. But I thought it may be useful for some developers to investigate.
This is to be expected. Usually, if the vulnerability was discovered in a large company's software, the trade would be on the dark net. In the case of electrum, the sale is being offered on twitter itself.
The basic safeguard most of us should take is store bitcoins for the long term on hardware wallets, or definitely not in a wallet which we use for daily use. Vulnerabilities may still be discovered, but are less likely.
Was really quite surprise that there's a vulnerability discovered on Electrum, I immediately moved my funds out as I was using a old version of Electrum. Luckily when I opened my wallet earlier, my funds is still intact but I can't moved it. I just shut it down immediately and just go online again after a few hours and successfully transferred my funds then.
This is to be expected though, usually once a vulnerability is found or exploits, it will spread like wildfires because everyone was in for the MONEY. Let's see how it goes though, I already moved everything but I haven't upgraded to the latest version. Thinking of moving to GreenAddress unless Electrum devs can tell the public that everything is fix already.
Edit: Vulnerabilities have been fixed already.