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<title>[12759] sites/trunk/common/includes/wporg-sso/wp-plugin.php: Login: SSO: When logging out, we no longer need to logout of every network individually, logging out of login.wordpress.org will correctly terminate the session on all sites.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://meta.trac.wordpress.org/changeset/12759">12759</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://meta.trac.wordpress.org/changeset/12759","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>dd32</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-07-25 05:02:49 +0000 (Tue, 25 Jul 2023)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Login: SSO: When logging out, we no longer need to logout of every network individually, logging out of login.wordpress.org will correctly terminate the session on all sites.

Partially reverts <a href="http://meta.trac.wordpress.org/changeset/12239">[12239]</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#sitestrunkcommonincludeswporgssowppluginphp">sites/trunk/common/includes/wporg-sso/wp-plugin.php</a></li>
</ul>

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<h3>Diff</h3>
<a id="sitestrunkcommonincludeswporgssowppluginphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/common/includes/wporg-sso/wp-plugin.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/common/includes/wporg-sso/wp-plugin.php       2023-07-25 04:07:53 UTC (rev 12758)
+++ sites/trunk/common/includes/wporg-sso/wp-plugin.php 2023-07-25 05:02:49 UTC (rev 12759)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -527,11 +527,14 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        $user = wp_get_current_user();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Perform the logout on this network first.
-                       wp_logout();
-
</del><span class="cx" style="display: block; padding: 0 10px">                         // Redirect back to the requested location.. the referer.. or failing that, the current sites front page after it's all done.
</span><span class="cx" style="display: block; padding: 0 10px">                        $logout_redirect = ( wp_unslash( $_REQUEST['redirect_to'] ?? '' ) ?: wp_get_referer() ) ?: home_url( '/' );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                       // Never to wp-admin.
+                       if ( str_contains( $logout_redirect, '/wp-admin/' ) ) {
+                               $logout_redirect = home_url( '/' );
+                       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                         $logout_redirect = apply_filters( 'logout_redirect', $logout_redirect, $logout_redirect, $user );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        $remote_logout_url = add_query_arg(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -538,7 +541,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                array(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'action'         => 'remote-logout',
</span><span class="cx" style="display: block; padding: 0 10px">                                        'redirect_to'    => urlencode( $logout_redirect ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'loggedout_on[]' => urlencode( $this->_get_targetted_host( $this->host ) ),
</del><span class="cx" style="display: block; padding: 0 10px">                                         'sso_logout'     => urlencode( $this->_generate_remote_token( $user ) )
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                                $this->sso_host_url . '/wp-login.php'
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -642,60 +644,36 @@
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * Log out a user from all sites and networks.
-                *
-                * This works by keeping track of the domains logged out on, and redirecting the user to the next
-                * site in self::VALID_HOSTS. Each is only requested once, so the user should experience minimal
-                * redirects.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * Log out a user and destroy the session.
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                protected function _maybe_perform_remote_logout() {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( empty( $_GET['sso_logout'] ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( empty( $_GET['sso_logout'] ) || ! $this->is_sso_host() ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 return;
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        // Validate the logout token.
</ins><span class="cx" style="display: block; padding: 0 10px">                         $remote_token = wp_unslash( $_GET['sso_logout'] );
</span><span class="cx" style="display: block; padding: 0 10px">                        $remote_token = $this->_validate_remote_token( $remote_token );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
</del><span class="cx" style="display: block; padding: 0 10px">                         if ( ! $remote_token || ! $remote_token['valid'] ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                return;
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $user = $remote_token['user'];
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // If the matching user is logged in, log them out.
-                       // If they're logged in as someone else, that's problematic, but we ignore that intentionally.
-                       if ( is_user_logged_in() && get_current_user_id() == $user->ID ) {
-                               wp_logout();
-                       }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Perform the logout. This will destroy the session, logging the user out of all sites.
+                       wp_logout();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Hosts logged out on..
-                       $logged_out_on     = (array) $_REQUEST['loggedout_on'] ?? [];
-                       $logged_out_on[]   = $this->_get_targetted_host( $this->host );
-                       $need_to_logout_on = array_diff( self::VALID_HOSTS, $logged_out_on );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Default to the logout confirmation screen, or back to the source site if possible.
+                       $redirect_to = $this->sso_host_url . '/loggedout';
+                       if ( ! empty( $_REQUEST['redirect_to'] ) ) {
+                               $requested_redirect_to = urldecode( wp_unslash( $_REQUEST['redirect_to'] ) );
+                               $redirect_to           = add_query_arg( 'redirect_to', urlencode( $requested_redirect_to ), $redirect_to );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Logged out everywhere, send them over to the logout confirmation screen.
-                       if ( ! $need_to_logout_on ) {
-                               $final_url = $this->sso_host_url . '/loggedout';
-
-                               if ( ! empty( $_REQUEST['redirect_to'] ) ) {
-                                       $final_url = add_query_arg( 'redirect_to', $_REQUEST['redirect_to'], $final_url );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // If the requested redirect_to is valid, use it.
+                               if ( wp_validate_redirect( $requested_redirect_to ) ) {
+                                       $redirect_to = $requested_redirect_to;
</ins><span class="cx" style="display: block; padding: 0 10px">                                 }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-                               $this->_safe_redirect( $final_url );
-                               exit;
</del><span class="cx" style="display: block; padding: 0 10px">                         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Redirect on to the next host in self::VALID_HOSTS to logout from.
-                       $logout_redirect = add_query_arg(
-                               array(
-                                       'action'       => 'remote-logout',
-                                       'sso_logout'   => urlencode( $this->_generate_remote_token( $user ) ),
-                                       'redirect_to'  => urlencode( wp_unslash( $_REQUEST['redirect_to'] ?? '' ) ),
-                                       'loggedout_on' => array_values( $logged_out_on )
-                               ),
-                               'https://' . reset( $need_to_logout_on ) . '/wp-login.php'
-                       );
-
-                       $this->_safe_redirect( $logout_redirect );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $this->_safe_redirect( $redirect_to );
</ins><span class="cx" style="display: block; padding: 0 10px">                         exit;
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre>
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