From 84fb4dd848ed630b3bf54ee7a77a013e4d684a1f Mon Sep 17 00:00:00 2001
From: Jb Audras <audrasjb@git.wordpress.org>
Date: Mon, 24 Jun 2024 15:35:29 +0000
Subject: [PATCH] Editor: Fix Path Traversal issue on Windows in Template-Part
 Block.

Merges [58470] to the 5.4 branch.
Props xknown, jorbin.




git-svn-id: https://develop.svn.wordpress.org/branches/5.4@58488 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/functions.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
index df1b5c7d41..0adfc14ee5 100644
--- a/src/wp-includes/functions.php
+++ b/src/wp-includes/functions.php
@@ -5296,6 +5296,9 @@ function iis7_supports_permalinks() {
  * @return int 0 means nothing is wrong, greater than 0 means something was wrong.
  */
 function validate_file( $file, $allowed_files = array() ) {
+	// Normalize path for Windows servers
+	$file = wp_normalize_path( $file );
+
 	// `../` on its own is not allowed:
 	if ( '../' === $file ) {
 		return 1;