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REST API: Check post meta update authorization only when value is changed. 

Resolves a bug where a post save will be reported as failed if the post includes any meta keys the current user does not have authorization to update, even when those meta values are unchanged.
Write authorization is now checked for a meta key only when the value of that key has changed, so that passing a REST response back unchanged will not cause failures.
Authorization is only needed when data will be updated.

Props ckoerner, TimothyBlynJacobs, spacedmonkey


Built from https://develop.svn.wordpress.org/trunk@56075


git-svn-id: http://core.svn.wordpress.org/trunk@55587 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
K. Adam White 2023-06-27 17:26:27 +00:00
parent 80abb55903
commit 0d9723a44e
2 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
wp-includes/rest-api/fields/class-wp-rest-meta-fields.php
View File

@ -368,6 +368,16 @@ abstract class WP_REST_Meta_Fields {
protected function update_meta_value( $object_id, $meta_key, $name, $value ) {
$meta_type = $this->get_meta_type();
// Do the exact same check for a duplicate value as in update_metadata() to avoid update_metadata() returning false.
$old_value = get_metadata( $meta_type, $object_id, $meta_key );
$subtype = get_object_subtype( $meta_type, $object_id );
if ( is_array( $old_value ) && 1 === count( $old_value )
&& $this->is_meta_value_same_as_stored_value( $meta_key, $subtype, $old_value[0], $value )
) {
return true;
}
if ( ! current_user_can( "edit_{$meta_type}_meta", $object_id, $meta_key ) ) {
return new WP_Error(
'rest_cannot_update',
@ -380,16 +390,6 @@ abstract class WP_REST_Meta_Fields {
);
}
// Do the exact same check for a duplicate value as in update_metadata() to avoid update_metadata() returning false.
$old_value = get_metadata( $meta_type, $object_id, $meta_key );
$subtype = get_object_subtype( $meta_type, $object_id );
if ( is_array( $old_value ) && 1 === count( $old_value )
&& $this->is_meta_value_same_as_stored_value( $meta_key, $subtype, $old_value[0], $value )
) {
return true;
}
if ( ! update_metadata( $meta_type, $object_id, wp_slash( $meta_key ), wp_slash( $value ) ) ) {
return new WP_Error(
'rest_meta_database_error',

2
wp-includes/version.php
View File

@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
$wp_version = '6.3-alpha-56074';
$wp_version = '6.3-alpha-56075';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.