Damion Brown's Blog

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WordPress Multisite Network Redirect Loop


  • Tue 17 October 2017
  • Debug

tl;dr: WordPress multisite has misconfiguration resulting in logic bug causing infinite redirect loop.


The Problem

In a wordpress network, the dashboard php file contains the following line

$redirect_network_admin_request = 0 !== strcasecmp( $current_blog->domain, $current_site->domain ) || 0 !== strcasecmp( $current_blog->path, $current_site->path );

This evaluation feeds an if statement which redirects the client on true. The if-statement compares the path and domain of the requested URI against values stored on the server.

The value of current_blog is pulled from the requested URI, the value of current_site are pulled from the wp_blogs table in the associated SQL database (Specifically the blog with ID of 1)

This comparison is sensitive to subdomains! If the domain is www.site.com and the current_site in wp_blogs is site.com the result is a redirect loop.


What would cause the domain to have www. prepended?

These settings right here:

image0

If you have https://www.domain.com, the wordpress site will keep adding www. to your URI.

When you attempt to access the network dashboard - infinite redirect loop.