Cloudbleed: what it is and what to do
What is Cloudbleed?
A few hours ago, Cloudflare announced that a bug in their servers that meant that in unusual circumstances, servers were returning more information than they should have; the information could potentially be used to hack into accounts on many, many websites. Now that the bug has been fixed, changing your passwords is strongly recommended.
I've never heard of Cloudflare. Why should I do anything?
Cloudflare is one of the largest content delivery network (CDN) companies in the world. Websites use their servers to allow for more users without slowing down their own servers to the point of crashing. As a result of the size of this company, many popular websites have been affected.
Which websites have been affected?
Cloudflare haven't released a list for privacy reasons, but it's safe to assume that any website that uses Cloudflare in some way has been affected. This includes:
Patreon
Stack Overflow
4Chan
Yelp
OKCupid
Uber
Discord
Fitbit
Change.org
Gyazo
The Pirate Bay
A full list can be found here. If you have an account on any of these websites, you should change your password.
Sources
Cloudflare's blog post regarding the issue
Google's Project Zero thread









