Posts, Post Types: Escape output within the_meta().

Convert markup to entities when displaying on the front end. Deprecates `the_meta()` in favor of `get_post_meta()`.

Props tykoted, martinkrcho, xknown, dd32, peterwilsoncc, paulkevan, timothyblynjacobs.


git-svn-id: https://develop.svn.wordpress.org/trunk@53958 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/post-template.php

@@ -1090,9 +1090,10 @@ function post_custom( $key = '' ) {
  *
  * @since 1.2.0
  *
- * @internal This will probably change at some point...
+ * @deprecated 6.0.2 Use get_post_meta() to retrieve post meta and render manually.
  */
 function the_meta() {
+	_deprecated_function( __FUNCTION__, '6.0.2', 'get_post_meta()' );
 	$keys = get_post_custom_keys();
 	if ( $keys ) {
 		$li_html = '';
@@ -1108,8 +1109,8 @@ function the_meta() {
 			$html = sprintf(
 				"<li><span class='post-meta-key'>%s</span> %s</li>\n",
 				/* translators: %s: Post custom field name. */
-				sprintf( _x( '%s:', 'Post custom field name' ), $key ),
-				$value
+				esc_html( sprintf( _x( '%s:', 'Post custom field name' ), $key ) ),
+				esc_html( $value )
 			);
 
 			/**