WPMU - HTTP Request at root path with special character in query key name causes endless loop

[ranwar]

Dear WP Team,

I observe the following erroneous behavior running WPMU at the latest Version (5.1), but this behavior regards at least version 4.98.

If I call a site from a WPMU instance without a context path but with a query key containing a sepcial character, the http-request ends in an endless loop.

Affected are at least german umlaut and special characters like [öäüÖÄÜß], but charachters like [§] as well.

For instance www.pleaseuseyourdemowpmuinstance.com?äöüfoo

I'm quite sure that this is a WordPress bug, cause the http response has following header.

"x-redirect-by WordPress"

So the redirect doesnt seem to be from any loadbalancer, cache server or webserver.

I hope to have contributed a bit to your great work, thank your very much!

Best Regards, Reza Anwar

[sabernhardt]

@ranwar Thanks for the ticket!

Does this still happen for you? I wasn't able to reproduce the error (though that's likely due to my local setup).