diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-revisions-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-revisions-controller.php
index 54285fa560bee..4108f9711c8a7 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-revisions-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-revisions-controller.php
@@ -189,7 +189,7 @@ public function get_items( $request ) {
 			$revisions_query = new WP_Query();
 			$revisions       = $revisions_query->query( $query_args );
 			$offset          = isset( $query_args['offset'] ) ? (int) $query_args['offset'] : 0;
-			$page            = (int) $query_args['paged'];
+			$page            = isset( $query_args['paged'] ) ? (int) $query_args['paged'] : 0;
 			$total_revisions = $revisions_query->found_posts;
 
 			if ( $total_revisions < 1 ) {
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
index c4db4871df644..0e8581614b1a0 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
@@ -457,7 +457,7 @@ static function ( $format ) {
 			remove_filter( 'post_password_required', array( $this, 'check_password_required' ) );
 		}
 
-		$page        = (int) $query_args['paged'];
+		$page        = isset( $query_args['paged'] ) ? (int) $query_args['paged'] : 0;
 		$total_posts = $posts_query->found_posts;
 
 		if ( $total_posts < 1 && $page > 1 ) {
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
index fb5fa29231a4f..1dbc611631b9b 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
@@ -294,7 +294,7 @@ public function get_items( $request ) {
 			$revisions_query = new WP_Query();
 			$revisions       = $revisions_query->query( $query_args );
 			$offset          = isset( $query_args['offset'] ) ? (int) $query_args['offset'] : 0;
-			$page            = (int) $query_args['paged'];
+			$page            = isset( $query_args['paged'] ) ? (int) $query_args['paged'] : 0;
 			$total_revisions = $revisions_query->found_posts;
 
 			if ( $total_revisions < 1 ) {