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<title>[47178] trunk: Posts, Post Types: Fail gracefully when checking mapped cap against unregistered post status.</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/47178">47178</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/47178","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>2020-02-04 22:13:15 +0000 (Tue, 04 Feb 2020)</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'>Posts, Post Types: Fail gracefully when checking mapped cap against unregistered post status.
With `map_meta_cap` enabled for a post type, the `read_post` capability for posts with a public status is supposed to be mapped to the post type's `read` capability.
When a post is left in the database after the post status is no longer present, and WP does a `read_post` check against it, a PHP notice was thrown, and the cap check always failed.
As a more graceful fallback, the cap is now mapped onto `edit_others_posts`, which allows highly privileged users to be able to access orphaned content.
A `_doing_it_wrong()` notice is also added, so that developers and site administrators are aware that the cap mapping is failing in the absence of the registered post status.
Follow-up to <a href="https://core.trac.wordpress.org/changeset/34091">[34091]</a>, which introduced a similar approach to checking mapped caps against an unregistered post type.
Props roytanck, SergeyBiryukov.
Fixes <a href="https://core.trac.wordpress.org/ticket/48653">#48653</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludescapabilitiesphp">trunk/src/wp-includes/capabilities.php</a></li>
<li><a href="#trunktestsphpunittestsusercapabilitiesphp">trunk/tests/phpunit/tests/user/capabilities.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpincludescapabilitiesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/capabilities.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/capabilities.php 2020-02-04 21:40:27 UTC (rev 47177)
+++ trunk/src/wp-includes/capabilities.php 2020-02-04 22:13:15 UTC (rev 47178)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -241,6 +241,13 @@
</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"> $status_obj = get_post_status_object( $post->post_status );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! $status_obj ) {
+ /* translators: 1: Post status, 2: Capability name. */
+ _doing_it_wrong( __FUNCTION__, sprintf( __( 'The post status %1$s is not registered, so it may not be reliable to check the capability "%2$s" against a post with that status.' ), $post->post_status, $cap ), '5.4.0' );
+ $caps[] = 'edit_others_posts';
+ break;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> if ( $status_obj->public ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $caps[] = $post_type->cap->read;
</span><span class="cx" style="display: block; padding: 0 10px"> break;
</span></span></pre></div>
<a id="trunktestsphpunittestsusercapabilitiesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/user/capabilities.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/user/capabilities.php 2020-02-04 21:40:27 UTC (rev 47177)
+++ trunk/tests/phpunit/tests/user/capabilities.php 2020-02-04 22:13:15 UTC (rev 47178)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1774,6 +1774,29 @@
</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><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @ticket 48653
+ * @expectedIncorrectUsage map_meta_cap
+ */
+ function test_require_edit_others_posts_if_post_status_doesnt_exist() {
+ register_post_status( 'existed' );
+ $post_id = self::factory()->post->create( array( 'post_status' => 'existed' ) );
+ _unregister_post_status( 'existed' );
+
+ $subscriber_id = self::$users['subscriber']->ID;
+ $editor_id = self::$users['editor']->ID;
+
+ foreach ( array( 'read_post', 'read_page' ) as $cap ) {
+ wp_set_current_user( $subscriber_id );
+ $this->assertSame( array( 'edit_others_posts' ), map_meta_cap( $cap, $subscriber_id, $post_id ) );
+ $this->assertFalse( current_user_can( $cap, $post_id ) );
+
+ wp_set_current_user( $editor_id );
+ $this->assertSame( array( 'edit_others_posts' ), map_meta_cap( $cap, $editor_id, $post_id ) );
+ $this->assertTrue( current_user_can( $cap, $post_id ) );
+ }
+ }
+
+ /**
</ins><span class="cx" style="display: block; padding: 0 10px"> * @ticket 17253
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function test_cpt_with_page_capability_type() {
</span></span></pre>
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