Prevent block style variation element styles from being removed for u…

…sers without unfiltered html caps

lib/class-wp-theme-json-gutenberg.php

@@ -3279,6 +3279,29 @@ public static function remove_insecure_properties( $theme_json ) {
 					}
 
 					$variation_output = static::remove_insecure_styles( $variation_input );
+
+					// Process a variation's elements and element pseudo selector styles.
+					if ( isset( $variation_input['elements'] ) ) {
+						foreach ( $valid_element_names as $element_name ) {
+							$element_input = $variation_input['elements'][ $element_name ] ?? null;
+							if ( $element_input ) {
+								$element_output = static::remove_insecure_styles( $element_input );
+
+								if ( isset( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ] ) ) {
+									foreach ( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ] as $pseudo_selector ) {
+										if ( isset( $element_input[ $pseudo_selector ] ) ) {
+											$element_output[ $pseudo_selector ] = static::remove_insecure_styles( $element_input[ $pseudo_selector ] );
+										}
+									}
+								}
+
+								if ( ! empty( $element_output ) ) {
+									_wp_array_set( $variation_output, array( 'elements', $element_name ), $element_output );
+								}
+							}
+						}
+					}
+
 					if ( ! empty( $variation_output ) ) {
 						_wp_array_set( $sanitized, $variation['path'], $variation_output );
 					}