diff --git a/src/admin/article_test_same.php b/src/admin/article_test_same.php
index 5ae6af4d..8b82335c 100644
--- a/src/admin/article_test_same.php
+++ b/src/admin/article_test_same.php
@@ -20,6 +20,7 @@ if ($dopost == 'analyse') {
         showmsg('栏目id不正确，无法处理', 'javascript:;');
         exit();
     }
+    $pagesize = intval($pagesize);
     $dsql->SetQuery("SELECT COUNT(title) AS dd,title FROM `$maintable` WHERE channel='$channelid' GROUP BY title ORDER BY dd DESC LIMIT 0, $pagesize");
     $dsql->Execute();
     $allarc = 0;
@@ -36,6 +37,10 @@ else if ($dopost == 'delsel') {
         echo "没有指定删除的文档";
         exit();
     }
+    if (!$dsql->IsTable($maintable)) {
+        ShowMsg("数据表名称错误", "javascript:;");
+        exit();
+    }
     $titless = split('`', $titles);
     if ($channelid < -1) {
         $orderby = ($deltype == 'delnew' ? " ORDER BY aid DESC " : " ORDER BY aid ASC ");
diff --git a/src/admin/index_body.php b/src/admin/index_body.php
index 1ab5202d..7cad265b 100644
--- a/src/admin/index_body.php
+++ b/src/admin/index_body.php
@@ -65,18 +65,43 @@ if (empty($dopost)) {
 <?php
     exit;
 } elseif ($dopost == "system_info") {
-    if (!extension_loaded("openssl")) {
+    if (empty(trim($cfg_auth_code))) {
+        $indexHTML = "";
+        if (file_exists(DEDEROOT."/index.html")) {
+            $indexHTML = file_get_contents(DEDEROOT."/index.html");
+        } else {
+            $row = $dsql->GetOne("SELECT * FROM `#@__homepageset`");
+            $row['templet'] = MfTemplet($row['templet']);
+            $pv = new PartView();
+            $pv->SetTemplet($cfg_basedir.$cfg_templets_dir."/".$row['templet']);
+            $row['showmod'] = isset($row['showmod']) ? $row['showmod'] : 0;
+            if ($row['showmod'] == 0) {
+                ob_start();
+                $pv->Display();
+                $indexHTML = ob_get_contents();
+                ob_end_clean();
+            }
+        }
+        $pattern = '/<a\s[^>]*href=["\']?([^"\'>\s]*)["\']?[^>]*>/is';
+        preg_match_all($pattern, $indexHTML, $matches);
+        $hasPowered = false;
+        foreach ($matches[1] as $href) {
+            if (preg_match("#^https://www.dedebiz.com#",$href)) {
+                $hasPowered = true;
+            }
+        }
+        $poweredStr = $hasPowered? "" : "请保留正确的<a href='https://www.dedebiz.com/powered_by_dedebiz' class='text-primary'>底部版权信息</a>，";
         echo json_encode(array(
-            "code" => -1001,
-            "msg" => "PHP不支持OpenSSL，无法完成商业版授权",
+            "code" => -1002,
+            "msg" => "当前站点已授权社区版，{$poweredStr}获取更多官方技术支持，请选择<a href='https://www.dedebiz.com/auth' class='text-primary'>商业版</a>",
             "result" => null,
         ));
         exit;
     }
-    if (empty(trim($cfg_auth_code))) {
+    if (!extension_loaded("openssl")) {
         echo json_encode(array(
-            "code" => -1002,
-            "msg" => "当前站点已授权社区版，获取更多官方技术支持，请选择<a href='https://www.dedebiz.com/auth' class='text-primary'>商业版</a>",
+            "code" => -1001,
+            "msg" => "PHP不支持OpenSSL，无法完成商业版授权",
             "result" => null,
         ));
         exit;
diff --git a/src/system/database/dedesqli.class.php b/src/system/database/dedesqli.class.php
index dfc688d5..1f812814 100755
--- a/src/system/database/dedesqli.class.php
+++ b/src/system/database/dedesqli.class.php
@@ -375,11 +375,14 @@ class DedeSqli
     function IsTable($tbname)
     {
         global $dsqli;
+        $prefix = "#@__";
+        $tbname = str_replace($prefix, $GLOBALS['cfg_dbprefix'], $tbname);
+        if (!preg_match('/^[\p{L}_][\p{L}\p{N}@$#\-_]*$/u', $tbname)) {
+            return FALSE;
+        }
         if (!$dsqli->isInit) {
             $this->Init($this->pconnect);
         }
-        $prefix = "#@__";
-        $tbname = str_replace($prefix, $GLOBALS['cfg_dbprefix'], $tbname);
         if (mysqli_num_rows(@mysqli_query($this->linkID, "SHOW TABLES LIKE '".$tbname."'"))) {
             return TRUE;
         }
diff --git a/src/system/database/dedesqlite.class.php b/src/system/database/dedesqlite.class.php
index af40b6a5..cfaa1aeb 100755
--- a/src/system/database/dedesqlite.class.php
+++ b/src/system/database/dedesqlite.class.php
@@ -352,11 +352,14 @@ class DedeSqlite
     function IsTable($tbname)
     {
         global $dsqlite;
+        $prefix = "#@__";
+        $tbname = str_replace($prefix, $GLOBALS['cfg_dbprefix'], $tbname);
+        if (!preg_match('/^[\p{L}_][\p{L}\p{N}@$#\-_]*$/u', $tbname)) {
+            return FALSE;
+        }
         if (!$dsqlite->isInit) {
             $this->Init($this->pconnect);
         }
-        $prefix = "#@__";
-        $tbname = str_replace($prefix, $GLOBALS['cfg_dbprefix'], $tbname);
         $row = $this->linkID->querySingle("PRAGMA table_info({$tbname});");
         if ($row !== null) {
             return TRUE;