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<title>[40111] branches/4.7: REST API: Do not allow access to users from a different site in multisite.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/40111">40111</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/40111","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2017-02-24 20:45:52 +0000 (Fri, 24 Feb 2017)</dd>
</dl>

<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>REST API: Do not allow access to users from a different site in multisite.

It has been unintendedly possible to both view and edit users from a different site than the current site in multisite environments. Moreover, when passing roles to a user in an update request, that user would implicitly be added to the current site.

This changeset removes the incorrect behavior for now in order to be able to provide a proper REST API workflow for managing multisite users in the near future. Related unit tests have been adjusted as well.

Props jnylen0, jeremyfelt, johnjamesjacoby.
Merges <a href="https://core.trac.wordpress.org/changeset/40106">[40106]</a> to the 4.7 branch.
Fixes <a href="https://core.trac.wordpress.org/ticket/39701">#39701</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches47srcwpincludesrestapiendpointsclasswprestuserscontrollerphp">branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php</a></li>
<li><a href="#branches47testsphpunittestsrestapirestuserscontrollerphp">branches/4.7/tests/phpunit/tests/rest-api/rest-users-controller.php</a></li>
</ul>

<h3>Property Changed</h3>
<ul>
<li><a href="#branches47">branches/4.7/</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<span class="cx" style="display: block; padding: 0 10px">Index: branches/4.7
</span><span class="cx" style="display: block; padding: 0 10px">===================================================================
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">--- branches/4.7 2017-02-24 20:40:45 UTC (rev 40110)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/4.7  2017-02-24 20:45:52 UTC (rev 40111)
</ins><a id="branches47"></a>
<div class="propset"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Property changes: branches/4.7</h4>
<pre class="diff"><span>
</span></pre></div>
<a id="svnmergeinfo"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: svn:mergeinfo</h4></div>
<span class="cx" style="display: block; padding: 0 10px"> /branches/3.1:18031
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.3:20543
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.4:21757
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/trunk:18512,39365,39367,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39420,39424,39426,39428,39430,39432-39434,39436,39438,39440,39442-39444,39447,39449-39451,39453,39455-39457,39460,39462,39464,39466,39468,39470-39471,39475,39477-39478,39482-39483,39487-39488,39490,39495-39496,39499,39502,39504,39506,39508,39510,39512,39514,39517,39520,39522,39545-39547,39557-39563,39565,39578,39580-39581,39584,39586,39594-39595,39597-39599,39601,39603,39612-39613,39616-39617,39619-39623,39626,39635,39640,39645,39649,39657,39659,39663,39677-39678,39680-39681,39684-39686,39688-39689,39692,39720,39742,39744,39759-39760,39772,39795,39807-39808,39831,39843,39848,39850,39912,39914,39923-39924,39949,39951-39952,39954,39956,39968,39992,39994,40030,40036,40039-40041,40045,40049,40055,40063-40064,40068,40070
 ,40080,40082,40086,40089
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:18512,39365,39367,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39420,39424,39426,39428,39430,39432-39434,39436,39438,39440,39442-39444,39447,39449-39451,39453,39455-39457,39460,39462,39464,39466,39468,39470-39471,39475,39477-39478,39482-39483,39487-39488,39490,39495-39496,39499,39502,39504,39506,39508,39510,39512,39514,39517,39520,39522,39545-39547,39557-39563,39565,39578,39580-39581,39584,39586,39594-39595,39597-39599,39601,39603,39612-39613,39616-39617,39619-39623,39626,39635,39640,39645,39649,39657,39659,39663,39677-39678,39680-39681,39684-39686,39688-39689,39692,39720,39742,39744,39759-39760,39772,39795,39807-39808,39831,39843,39848,39850,39912,39914,39923-39924,39949,39951-39952,39954,39956,39968,39992,39994,40030,40036,40039-40041,40045,40049,40055,40063-40064,40068,40070,
 40080,40082,40086,40089,40106
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches47srcwpincludesrestapiendpointsclasswprestuserscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php        2017-02-24 20:40:45 UTC (rev 40110)
+++ branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php  2017-02-24 20:45:52 UTC (rev 40111)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -350,6 +350,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        return $error;
</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">+                if ( is_multisite() && ! is_user_member_of_blog( $user->ID ) ) {
+                       return $error;
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 return $user;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -638,10 +642,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                /* This action is documented in lib/endpoints/class-wp-rest-users-controller.php */
</span><span class="cx" style="display: block; padding: 0 10px">                do_action( 'rest_insert_user', $user, $request, false );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( is_multisite() && ! is_user_member_of_blog( $id ) ) {
-                       add_user_to_blog( get_current_blog_id(), $id, '' );
-               }
-
</del><span class="cx" style="display: block; padding: 0 10px">                 if ( ! empty( $request['roles'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        array_map( array( $user, 'add_role' ), $request['roles'] );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span></span></pre></div>
<a id="branches47testsphpunittestsrestapirestuserscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.7/tests/phpunit/tests/rest-api/rest-users-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.7/tests/phpunit/tests/rest-api/rest-users-controller.php       2017-02-24 20:40:45 UTC (rev 40110)
+++ branches/4.7/tests/phpunit/tests/rest-api/rest-users-controller.php 2017-02-24 20:45:52 UTC (rev 40111)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -685,10 +685,15 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'GET', '/wp/v2/users/' . $lolz );
</span><span class="cx" style="display: block; padding: 0 10px">                $request->set_param( 'context', 'edit' );
</span><span class="cx" style="display: block; padding: 0 10px">                $response = $this->server->dispatch( $request );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $data = $response->get_data();
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $this->assertEquals( $data['capabilities'], new stdClass() );
-               $this->assertEquals( $data['extra_capabilities'], new stdClass() );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( is_multisite() ) {
+                       $this->assertErrorResponse( 'rest_user_invalid_id', $response, 404 );
+               } else {
+                       $data = $response->get_data();
+
+                       $this->assertEquals( $data['capabilities'], new stdClass() );
+                       $this->assertEquals( $data['extra_capabilities'], new stdClass() );
+               }
</ins><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">        public function test_get_item_without_permission() {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -998,44 +1003,6 @@
</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">-        public function test_update_existing_network_user_on_sub_site_adds_user_to_site() {
-               if ( ! is_multisite() ) {
-                       $this->markTestSkipped( 'Test requires multisite.' );
-               }
-
-               $this->allow_user_to_manage_multisite();
-
-               $params = array(
-                       'username' => 'testuser123',
-                       'password' => 'testpassword',
-                       'email'    => 'test@example.com',
-                       'name'     => 'Test User 123',
-                       'roles'    => array( 'editor' ),
-               );
-
-               $request = new WP_REST_Request( 'POST', '/wp/v2/users' );
-               $request->add_header( 'content-type', 'application/x-www-form-urlencoded' );
-               $request->set_body_params( $params );
-               $response = $this->server->dispatch( $request );
-               $data = $response->get_data();
-               $user_id = $data['id'];
-
-               switch_to_blog( self::$site );
-
-               $request = new WP_REST_Request( 'PUT', '/wp/v2/users/' . $user_id );
-               $request->add_header( 'content-type', 'application/x-www-form-urlencoded' );
-               $request->set_body_params( $params );
-               $this->server->dispatch( $request );
-
-               restore_current_blog();
-
-               $user_is_member = is_user_member_of_blog( $user_id, self::$site );
-
-               wpmu_delete_user( $user_id );
-
-               $this->assertTrue( $user_is_member );
-       }
-
</del><span class="cx" style="display: block; padding: 0 10px">         public function test_json_create_user() {
</span><span class="cx" style="display: block; padding: 0 10px">                $this->allow_user_to_manage_multisite();
</span><span class="cx" style="display: block; padding: 0 10px">                wp_set_current_user( self::$user );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2151,6 +2118,140 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $wp_rest_additional_fields = array();
</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">+        /**
+        * @ticket 39701
+        */
+       public function test_get_item_from_different_site_as_site_administrator() {
+               if ( ! is_multisite() ) {
+                       $this->markTestSkipped( 'Test only runs in multisite' );
+               }
+
+               switch_to_blog( self::$site );
+               $user_id = $this->factory->user->create( array(
+                       'role' => 'author',
+               ) );
+               restore_current_blog();
+
+               wp_set_current_user( self::$user );
+               $request = new WP_REST_Request( 'GET', sprintf( '/wp/v2/users/%d', $user_id ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertErrorResponse( 'rest_user_invalid_id', $response, 404 );
+       }
+
+       /**
+        * @ticket 39701
+        */
+       public function test_get_item_from_different_site_as_network_administrator() {
+               if ( ! is_multisite() ) {
+                       $this->markTestSkipped( 'Test only runs in multisite' );
+               }
+
+               switch_to_blog( self::$site );
+               $user_id = $this->factory->user->create( array(
+                       'role' => 'author',
+               ) );
+               restore_current_blog();
+
+               wp_set_current_user( self::$superadmin );
+               $request = new WP_REST_Request( 'GET', sprintf( '/wp/v2/users/%d', $user_id ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertErrorResponse( 'rest_user_invalid_id', $response, 404 );
+       }
+
+       /**
+        * @ticket 39701
+        */
+       public function test_update_item_from_different_site_as_site_administrator() {
+               if ( ! is_multisite() ) {
+                       $this->markTestSkipped( 'Test only runs in multisite' );
+               }
+
+               switch_to_blog( self::$site );
+               $user_id = $this->factory->user->create( array(
+                       'role' => 'author',
+               ) );
+               restore_current_blog();
+
+               wp_set_current_user( self::$user );
+               $request = new WP_REST_Request( 'PUT', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request->add_header( 'content-type', 'application/x-www-form-urlencoded' );
+               $request->set_body_params( array( 'first_name' => 'New Name' ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertErrorResponse( 'rest_user_invalid_id', $response, 404 );
+       }
+
+       /**
+        * @ticket 39701
+        */
+       public function test_update_item_from_different_site_as_network_administrator() {
+               if ( ! is_multisite() ) {
+                       $this->markTestSkipped( 'Test only runs in multisite' );
+               }
+
+               switch_to_blog( self::$site );
+               $user_id = $this->factory->user->create( array(
+                       'role' => 'author',
+               ) );
+               restore_current_blog();
+
+               wp_set_current_user( self::$superadmin );
+               $request = new WP_REST_Request( 'PUT', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request->add_header( 'content-type', 'application/x-www-form-urlencoded' );
+               $request->set_body_params( array( 'first_name' => 'New Name' ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertErrorResponse( 'rest_user_invalid_id', $response, 404 );
+       }
+
+       /**
+        * @ticket 39701
+        */
+       public function test_delete_item_from_different_site_as_site_administrator() {
+               if ( ! is_multisite() ) {
+                       $this->markTestSkipped( 'Test only runs in multisite' );
+               }
+
+               switch_to_blog( self::$site );
+               $user_id = $this->factory->user->create( array(
+                       'role' => 'author',
+               ) );
+               restore_current_blog();
+
+               wp_set_current_user( self::$user );
+               $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request->set_param( 'force', true );
+               $request->set_param( 'reassign', false );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertErrorResponse( 'rest_user_invalid_id', $response, 404 );
+       }
+
+       /**
+        * @ticket 39701
+        */
+       public function test_delete_item_from_different_site_as_network_administrator() {
+               if ( ! is_multisite() ) {
+                       $this->markTestSkipped( 'Test only runs in multisite' );
+               }
+
+               switch_to_blog( self::$site );
+               $user_id = $this->factory->user->create( array(
+                       'role' => 'author',
+               ) );
+               restore_current_blog();
+
+               wp_set_current_user( self::$superadmin );
+               $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request->set_param( 'force', true );
+               $request->set_param( 'reassign', false );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertErrorResponse( 'rest_user_invalid_id', $response, 404 );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         public function additional_field_get_callback( $object ) {
</span><span class="cx" style="display: block; padding: 0 10px">                return get_user_meta( $object['id'], 'my_custom_int', true );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span></span></pre>
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