In response to news of an information leak at CloudFlare, we are requesting that our users take the time to change their passwords on potentially affected websites, including e621. Here at e621 we use CloudFlare to help protect against distributed denial of service attacks that would be disruptive to usage of the site, and it is an important part of our architecture. CloudFlare recently announced that an extremely small percentage of requests could result in leaked information from previous requests being included by mistake. CloudFlare has since resolved the issue that was leaking information.

While we have found no evidence that this leak has personally affected e621, we cannot be sure of the scope of the leaked information. As a result, we are requesting that you change your password as a precaution.

The official announcement from CloudFlare can be found here.

Because this has the potential to have impacted a very large number of sites, you should review your passwords sharing habits and consider using a password manager and a unique password per website.

A list of potentially impacted sites can be found here.

Stay safe out there.
~e621 Staff

Clarification edit:
This does not represent a compromise of the e621 website or services. The website was not hacked or compromised as a result of this event. This is a precautionary advisory only.