Ticket #47281: 47281.2.patch

src/wp-includes/kses.php

@@ -2063 +2063 @@
          * @since 5.0.0 Added support for `background-image`.
          * @since 5.1.0 Added support for `text-transform`.
          * @since 5.2.0 Added support for `background-position` and `grid-template-columns`
+         * @since 5.3.0 Added support for `flex`, `flex-grow`, `flex-shrink`, and `flex-basis`.
          *
          * @param string[] $attr Array of allowed CSS attributes.
          */
@@ -2133 +2134 @@
                         'padding-left',
                         'padding-top',
 
+                        'flex',
+                        'flex-grow',
+                        'flex-shrink',
+                        'flex-basis',
+
                         'clear',
                         'cursor',
                         'direction',