[BETA] WP Cloudflare Access SSO: wp-access-sso

A super simple way to allow a single sign on to your Wordpress site when using Cloudflare Access.

Ideal use case: Whitelist (in Cloudflare Access) the email addresses that are allowed access a specific URL (ie. wp-admin/wp-login.php) or an entire site (ie. a corporate intranet). When a user tries to login they'll be sent Cloudflare Access's 6-digit 2FA code. Entering this allows the user to pass through to the Wordpress site. This plugin sets the user based on the email address sent through a header from Cloudflare Access.

Upon logging out, a redirect to Cloudflare Access's session terminating URL is triggered.

If no matching email address is found in the database - an error message appears:

User not found in site database. Please contact your site administrator for access.

IMPORTANT:

• This is not currently recommended on production as it has not been properly security audited.
• It is VERY IMPORTANT that you ensure only requests from Cloudflare IPs (and your server itself) are allowed connect to your Wordpress site when this plugin is activated. You can find the list of Cloudflare IP Ranges here.
• Ensure that Enable Binding Cookie is enable in Cloudflare (Cloudflare for Teams -> Access -> Applications -> Settings -> Enable Binding Cookie) to protect against stolen authorization cookies within your org.

TO INSTALL: Place the /wp-access-sso/wp-access-sso.php in /wp-content/plugins/ and activate. There are no settings - it just works.

QUESTIONS/SUGGESTIONS?

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