diff --git a/src/wp-includes/kses.php b/src/wp-includes/kses.php
index b707dca813..6f953ee92f 100644
--- a/src/wp-includes/kses.php
+++ b/src/wp-includes/kses.php
@@ -2081,8 +2081,12 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 			'background-color',
 			'background-image',
 			'background-position',
+			'background-size',
+			'background-attachment',
+			'background-blend-mode',
 
 			'border',
+			'border-radius',
 			'border-width',
 			'border-color',
 			'border-style',
@@ -2107,6 +2111,11 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 			'border-collapse',
 			'caption-side',
 
+			'columns',
+			'column-count',
+			'column-gap',
+			'column-span',
+
 			'color',
 			'font',
 			'font-family',
@@ -2153,7 +2162,32 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 			'overflow',
 			'vertical-align',
 			'list-style-type',
+
+			'flex',
+			'flex-direction',
+			'flex-flow',
+			'flex-grow',
+			'justify-content',
+			'justify-items',
+			'justify-self',
+			'align-content',
+			'align-items',
+			'align-self',
+
 			'grid-template-columns',
+			'grid-template-rows',
+			'grid-gap',
+			'grid-column-gap',
+			'grid-row-gap',
+			'grid-column',
+			'grid-row',
+			'grid-column-start',
+			'grid-column-end',
+			'grid-column-start',
+			'grid-row-start',
+
+			'clip-path',
+			'shape-outside',
 		)
 	);