From e605fb7f4dd95da495f4bad87ac44d8e782690df Mon Sep 17 00:00:00 2001
From: Ryan Boren <ryan@git.wordpress.org>
Date: Sat, 29 Dec 2007 03:14:33 +0000
Subject: [PATCH] Extra traversal check.

git-svn-id: https://develop.svn.wordpress.org/trunk@6520 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-admin/includes/file.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/wp-admin/includes/file.php b/wp-admin/includes/file.php
index cc09c7503c..dbbd5ce79b 100644
--- a/wp-admin/includes/file.php
+++ b/wp-admin/includes/file.php
@@ -43,6 +43,9 @@ function get_real_file_to_edit( $file ) {
 }
 
 function validate_file( $file, $allowed_files = '' ) {
+	if ( false !== strpos( $file, '..' ))
+		return 1;
+
 	if ( false !== strpos( $file, './' ))
 		return 1;