The FREAK crypto downgrade attack

Look under the heading "Servers" on the mentioned page, and there is a link to https://tools.keycdn.com/freak , which can test if your web server is vulnerable.

The authors say that 37% of all servers are vulnerable, but that may depend on where in the world you are. I had to search very hard before I finally found a server in the wild that is vulnerable to this. The published top list of vulnerable sites consists mostly of Chinese and Indian sites (but then again, that may be true for most of the web today).