diff --git a/wp-includes/class-snoopy.php b/wp-includes/class-snoopy.php
index 89c3594bd1..9711a28d61 100644
--- a/wp-includes/class-snoopy.php
+++ b/wp-includes/class-snoopy.php
@@ -1014,7 +1014,7 @@ class Snoopy
 		$headerfile = tempnam($temp_dir, "sno");
 
 		$safer_URI = strtr( $URI, "\"", " " ); // strip quotes from the URI to avoid shell access
-		exec($this->curl_path." -D \"$headerfile\"".$cmdline_params." \"".$safer_URI."\"",$results,$return);
+		exec(escapeshellcmd($this->curl_path." -D \"$headerfile\"".$cmdline_params." \"".$safer_URI."\""),$results,$return);
 		
 		if($return)
 		{