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Editor: Fix Path Traversal issue on Windows in Template-Part Block.
Merges [58470] to the 4.5 branch. Props xknown, jorbin. Built from https://develop.svn.wordpress.org/branches/4.5@58497 git-svn-id: http://core.svn.wordpress.org/branches/4.5@57946 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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@ -4117,6 +4117,9 @@ function iis7_supports_permalinks() {
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* @return int 0 means nothing is wrong, greater than 0 means something was wrong.
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*/
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function validate_file( $file, $allowed_files = '' ) {
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// Normalize path for Windows servers
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$file = wp_normalize_path( $file );
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if ( false !== strpos( $file, '..' ) )
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return 1;
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