Searched and couldn't find anything but closed, unresolved posts.
Experienced a strange bug on a WordPress install today where the comment fields: Name, E-Mail, and Website, were filled in with some random person's details. Refreshing didn't seem to solve the problem.
We're not behind the same NAT or using the same Internet connection (don't know the guy at all).
We have multiple Wi-Fi hotspots connected to the Internet via different ISPs here, so I disconnected my ethernet cable and connected to one of the APs that use a different ISP to the one I was using. When I refreshed the fields were empty.
This only seemed to happen on one post, not others as well. I navigated to different posts and navigated back (not just using the back button).
Then I disconnected from the AP, plugged my network cable back in, and when I refreshed the fields were still blank.
So first up: How does WordPress know which details to fill into the fields?
And: Why would this error occur?