WooYun.org

$news['cs_content']=$this->CsdjSkins->uhtml($this->input->post('cs_content'));   //内容

function uhtml($str)  {  
               $farr = array(  
                              "/\\s+/", //过滤多余的空白  
                              "/<(\\/?)(script|i?frame|style|html|body|title|link|meta|\\?|\\%)([^>]*?)>/isU", //过滤 <script 等可能引入恶意内容或恶意改变显示布局的代码,如果不需要插入flash等,还可以加入<object的过滤  
                              "/(<[^>]*)on[a-zA-Z]+\\s*=([^>]*>)/isU", //过滤javascrīpt的on事件  
               );  
               $tarr = array( " ",  " ", "\1\2", );  
               $str = preg_replace( $farr,$tarr,$str);  
               return remove_xss($str);  
         }
         //xss过滤函数
         function remove_xss($string) { 
             $string = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S', '', $string);
             $parm1 = Array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base');
             $parm2 = Array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload', 'onprogress', 'alert');
             $parm = array_merge($parm1, $parm2); 
	         for ($i = 0; $i < sizeof($parm); $i++) { 
		         $pattern = '/'; 
		         for ($j = 0; $j < strlen($parm[$i]); $j++) { 
			         if ($j > 0) { 
				         $pattern .= '('; 
				         $pattern .= '(&#[x|X]0([9][a][b]);?)?'; 
				         $pattern .= '|(&#0([9][10][13]);?)?'; 
				         $pattern .= ')?'; 
			         }
			         $pattern .= $parm[$i][$j]; 
		         }
		         $pattern .= '/i';
		         $string = preg_replace($pattern, '', $string); 
	         }
	         return $string;
         }

<scrscriptipt>aleralertt(/UncleJim/)</scriscriptpt>UncleJim