diff --git a/adm/member_list_update.php b/adm/member_list_update.php
index 6c5049a86..eb6d8f791 100644
--- a/adm/member_list_update.php
+++ b/adm/member_list_update.php
@@ -10,6 +10,8 @@ if (!count($_POST['chk'])) {
 
 auth_check($auth[$sub_menu], 'w');
 
+check_admin_token();
+
 if ($_POST['act_button'] == "선택수정") {
 
     for ($i=0; $i<count($_POST['chk']); $i++)
diff --git a/adm/poll_form.php b/adm/poll_form.php
index 6181b1375..2d259b58e 100644
--- a/adm/poll_form.php
+++ b/adm/poll_form.php
@@ -4,6 +4,8 @@ include_once('./_common.php');
 
 auth_check($auth[$sub_menu], 'w');
 
+$po_id = isset($po_id) ? (int) $po_id : 0;
+
 $html_title = '투표';
 if ($w == '')
     $html_title .= ' 생성';
diff --git a/adm/sms_admin/form_group_update.php b/adm/sms_admin/form_group_update.php
index 058980a11..ee8b1627a 100644
--- a/adm/sms_admin/form_group_update.php
+++ b/adm/sms_admin/form_group_update.php
@@ -10,9 +10,9 @@ if ($w == 'u') // 업데이트
     {
         // 실제 번호를 넘김
         $k = $_POST['chk'][$i];
-        $fg_no = $_POST['fg_no'][$k];
-        $fg_name = $_POST['fg_name'][$k];
-        $fg_member = $_POST['fg_member'][$k];
+        $fg_no = (int) $_POST['fg_no'][$k];
+        $fg_name = strip_tags($_POST['fg_name'][$k]);
+        $fg_member = strip_tags($_POST['fg_member'][$k]);
 
         if (!is_numeric($fg_no))
             alert('그룹 고유번호가 없습니다.');
@@ -38,7 +38,7 @@ else if ($w == 'de') // 그룹삭제
     {
         // 실제 번호를 넘김
         $k = $_POST['chk'][$i];
-        $fg_no = $_POST['fg_no'][$k];
+        $fg_no = (int) $_POST['fg_no'][$k];
 
         if (!is_numeric($fg_no))
             alert('그룹 고유번호가 없습니다.');
@@ -57,7 +57,7 @@ else if ($w == 'em')
     {
         // 실제 번호를 넘김
         $k = $_POST['chk'][$i];
-        $fg_no = $_POST['fg_no'][$k];
+        $fg_no = (int) $_POST['fg_no'][$k];
 
         if ($fg_no == 'no') $fg_no = 0;
 
@@ -71,6 +71,8 @@ else if ($w == 'no')
 {
     if ($fg_no == 'no') $fg_no = 0;
 
+    $fg_no = (int) $fg_no;
+
     if ($fg_no)
         sql_query("update {$g5['sms5_form_group_table']} set fg_count = 0 where fg_no = '$fg_no'");
 
@@ -81,6 +83,8 @@ else // 등록
     if (!strlen(trim($fg_name)))
         alert('그룹명을 입력해주세요');
 
+    $fg_name = strip_tags($fg_name);
+
     $res = sql_fetch("select fg_name from {$g5['sms5_form_group_table']} where fg_name = '$fg_name'");
     if ($res)
         alert('같은 그룹명이 존재합니다.');
diff --git a/adm/sms_admin/form_update.php b/adm/sms_admin/form_update.php
index 9059b91bf..080656e94 100644
--- a/adm/sms_admin/form_update.php
+++ b/adm/sms_admin/form_update.php
@@ -4,6 +4,9 @@ include_once("./_common.php");
 
 auth_check($auth[$sub_menu], "w");
 
+$fo_name = isset($fo_name) ? strip_tags($fo_name) : '';
+$fo_content = isset($fo_content) ? strip_tags($fo_content) : '';
+
 $g5['title'] = "이모티콘 업데이트";
 
 if ($w == 'u') // 업데이트
diff --git a/adm/sms_admin/num_group_update.php b/adm/sms_admin/num_group_update.php
index ea9af2423..f23f31bea 100644
--- a/adm/sms_admin/num_group_update.php
+++ b/adm/sms_admin/num_group_update.php
@@ -10,8 +10,8 @@ if ($w == 'u') // 업데이트
     {
         // 실제 번호를 넘김
         $k = $_POST['chk'][$i];
-        $bg_no = $_POST['bg_no'][$k];
-        $bg_name = $_POST['bg_name'][$k];
+        $bg_no = (int) $_POST['bg_no'][$k];
+        $bg_name = strip_tags($_POST['bg_name'][$k]);
 
         if (!is_numeric($bg_no))
             alert('그룹 고유번호가 없습니다.');
@@ -36,7 +36,7 @@ else if ($w == 'de') // 그룹삭제
     {
         // 실제 번호를 넘김
         $k = $_POST['chk'][$i];
-        $bg_no = $_POST['bg_no'][$k];
+        $bg_no = (int) $_POST['bg_no'][$k];
 
         if (!is_numeric($bg_no))
             alert('그룹 고유번호가 없습니다.');
@@ -55,7 +55,7 @@ else if ($w == 'em') // 비우기
     {
         // 실제 번호를 넘김
         $k = $_POST['chk'][$i];
-        $bg_no = $_POST['bg_no'][$k];
+        $bg_no = (int) $_POST['bg_no'][$k];
 
         sql_query("update {$g5['sms5_book_group_table']} set bg_count = 0, bg_member = 0, bg_nomember = 0, bg_receipt = 0, bg_reject = 0 where bg_no='$bg_no'");
         sql_query("delete from {$g5['sms5_book_table']} where bg_no='$bg_no'");
@@ -63,6 +63,8 @@ else if ($w == 'em') // 비우기
 }
 else // 등록
 {
+    $bg_name = strip_tags($bg_name);
+
     if (!strlen(trim($bg_name)))
         alert('그룹명을 입력해주세요');
 
diff --git a/bbs/logout.php b/bbs/logout.php
index c9a0f4ba7..253c042df 100644
--- a/bbs/logout.php
+++ b/bbs/logout.php
@@ -11,7 +11,10 @@ set_cookie('ck_auto', '', 0);
 // 자동로그인 해제 end --------------------------------
 
 if ($url) {
-    $p = @parse_url($url);
+    if ( substr($url, 0, 2) == '//' )
+        $url = 'http:' . $url;
+
+    $p = @parse_url(urldecode($url));
     if ($p['scheme'] || $p['host']) {
         alert('url에 도메인을 지정할 수 없습니다.');
     }
diff --git a/bbs/memo.php b/bbs/memo.php
index a6af0663c..56288d93f 100644
--- a/bbs/memo.php
+++ b/bbs/memo.php
@@ -4,6 +4,8 @@ include_once('./_common.php');
 if ($is_guest)
     alert_close('회원만 이용하실 수 있습니다.');
 
+set_session('ss_memo_delete_token', $token = uniqid(time()));
+
 $g5['title'] = '내 쪽지함';
 include_once(G5_PATH.'/head.sub.php');
 
@@ -65,7 +67,7 @@ for ($i=0; $row=sql_fetch_array($result); $i++)
     $list[$i]['send_datetime'] = $send_datetime;
     $list[$i]['read_datetime'] = $read_datetime;
     $list[$i]['view_href'] = './memo_view.php?me_id='.$row['me_id'].'&amp;kind='.$kind;
-    $list[$i]['del_href'] = './memo_delete.php?me_id='.$row['me_id'].'&amp;kind='.$kind;
+    $list[$i]['del_href'] = './memo_delete.php?me_id='.$row['me_id'].'&amp;token='.$token.'&amp;kind='.$kind;
 }
 
 include_once($member_skin_path.'/memo.skin.php');
diff --git a/bbs/memo_delete.php b/bbs/memo_delete.php
index e80fc956d..743d8392e 100644
--- a/bbs/memo_delete.php
+++ b/bbs/memo_delete.php
@@ -4,6 +4,12 @@ include_once('./_common.php');
 if (!$is_member)
     alert('회원만 이용하실 수 있습니다.');
 
+$delete_token = get_session('ss_memo_delete_token');
+set_session('ss_memo_delete_token', '');
+
+if (!($token && $delete_token == $token))
+    alert('토큰 에러로 삭제 불가합니다.');
+
 $me_id = (int)$_REQUEST['me_id'];
 
 $sql = " select * from {$g5['memo_table']} where me_id = '{$me_id}' ";
diff --git a/bbs/qadelete.php b/bbs/qadelete.php
index bc22d1eba..a26fff7e1 100644
--- a/bbs/qadelete.php
+++ b/bbs/qadelete.php
@@ -4,6 +4,12 @@ include_once('./_common.php');
 if($is_guest)
     alert('회원이시라면 로그인 후 이용해 주십시오.', G5_URL);
 
+$delete_token = get_session('ss_qa_delete_token');
+set_session('ss_qa_delete_token', '');
+
+if (!($token && $delete_token == $token))
+    alert('토큰 에러로 삭제 불가합니다.');
+
 $tmp_array = array();
 if ($qa_id) // 건별삭제
     $tmp_array[0] = $qa_id;
diff --git a/bbs/qaview.php b/bbs/qaview.php
index f6b294468..1b5c38227 100644
--- a/bbs/qaview.php
+++ b/bbs/qaview.php
@@ -109,7 +109,8 @@ if(is_file($skin_file)) {
     */
     if(($view['qa_type'] && $is_admin) || (!$view['qa_type'] && $view['qa_status'] == 0)) {
         $update_href = G5_BBS_URL.'/qawrite.php?w=u&amp;qa_id='.$view['qa_id'].$qstr;
-        $delete_href = G5_BBS_URL.'/qadelete.php?qa_id='.$view['qa_id'].$qstr;
+        set_session('ss_qa_delete_token', $token = uniqid(time()));
+        $delete_href = G5_BBS_URL.'/qadelete.php?qa_id='.$view['qa_id'].'&amp;token='.$token.$qstr;
     }
 
     // 질문글이고 등록된 답변이 있다면
diff --git a/bbs/qawrite_update.php b/bbs/qawrite_update.php
index b00d0827b..69a4efa82 100644
--- a/bbs/qawrite_update.php
+++ b/bbs/qawrite_update.php
@@ -200,7 +200,7 @@ for ($i=1; $i<=count($_FILES['bf_file']['name']); $i++) {
         $upload[$i]['filesize'] = $filesize;
 
         // 아래의 문자열이 들어간 파일은 -x 를 붙여서 웹경로를 알더라도 실행을 하지 못하도록 함
-        $filename = preg_replace("/\.(php|phtm|htm|cgi|pl|exe|jsp|asp|inc)/i", "$0-x", $filename);
+        $filename = preg_replace("/\.(php|pht|phtm|htm|cgi|pl|exe|jsp|asp|inc)/i", "$0-x", $filename);
 
         shuffle($chars_array);
         $shuffle = implode('', $chars_array);
diff --git a/bbs/write_update.php b/bbs/write_update.php
index 2dbbddde1..2b37dbd23 100644
--- a/bbs/write_update.php
+++ b/bbs/write_update.php
@@ -524,7 +524,7 @@ for ($i=0; $i<count($_FILES['bf_file']['name']); $i++) {
         $upload[$i]['filesize'] = $filesize;
 
         // 아래의 문자열이 들어간 파일은 -x 를 붙여서 웹경로를 알더라도 실행을 하지 못하도록 함
-        $filename = preg_replace("/\.(php|phtm|htm|cgi|pl|exe|jsp|asp|inc)/i", "$0-x", $filename);
+        $filename = preg_replace("/\.(php|pht|phtm|htm|cgi|pl|exe|jsp|asp|inc)/i", "$0-x", $filename);
 
         shuffle($chars_array);
         $shuffle = implode('', $chars_array);
diff --git a/install/install_db.php b/install/install_db.php
index d5d9b9a79..43da32e98 100644
--- a/install/install_db.php
+++ b/install/install_db.php
@@ -592,7 +592,7 @@ fclose($f);
 // data 디렉토리 및 하위 디렉토리에서는 .htaccess .htpasswd .php .phtml .html .htm .inc .cgi .pl 파일을 실행할수 없게함.
 $f = fopen($data_path.'/.htaccess', 'w');
 $str = <<<EOD
-<FilesMatch "\.(htaccess|htpasswd|[Pp][Hh][Pp]|[Pp]?[Hh][Tt][Mm][Ll]?|[Ii][Nn][Cc]|[Cc][Gg][Ii]|[Pp][Ll])">
+<FilesMatch "\.(htaccess|htpasswd|[Pp][Hh][Pp]|[Pp][Hh][Tt]|[Pp]?[Hh][Tt][Mm][Ll]?|[Ii][Nn][Cc]|[Cc][Gg][Ii]|[Pp][Ll])">
 Order allow,deny
 Deny from all
 </FilesMatch>
diff --git a/lib/common.lib.php b/lib/common.lib.php
index c205eaf8d..84d2c14d3 100644
--- a/lib/common.lib.php
+++ b/lib/common.lib.php
@@ -2967,9 +2967,13 @@ function replace_filename($name)
     @session_start();
     $ss_id = session_id();
     $usec = get_microtime();
-    $ext = array_pop(explode('.', $name));
+    $file_path = pathinfo($name);
+    $ext = $file_path['extension'];
+    $return_filename = sha1($ss_id.$_SERVER['REMOTE_ADDR'].$usec); 
+    if( $ext )
+        $return_filename .= '.'.$ext;
 
-    return sha1($ss_id.$_SERVER['REMOTE_ADDR'].$usec).'.'.$ext;
+    return $return_filename;
 }
 
 // 아이코드 사용자정보