![](/style/images/good.png)
2
![](/style/images/bad.png)
【alert(1) to win】 Level 02 - Adobe
source link: https://exp-blog.com/safe/ctf/alert/level-02-adobe/
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【alert(1) to win】 Level 02
javascript
function escape(s) {
s = s.replace(/"/g, '\\"');
return '<script>console.log("' + s + '");</script>';
}
由于所有 "
都被转义为 \"
,导致无法直接闭合函数。
但是不能直接闭合,不等于无法闭合。
因为只是转义了双引号 "
,没有转义反斜杠 \
,那么我们只需要再输入一个反斜杠去吃掉转义双引号的反斜杠,那么双引号就得以保留,并用来闭合函数了。
于是可以构造 payload 如下 (此处没有闭合后半段的双引号,而是通过行注释 //
屏蔽掉):
javascript
\");alert(1);//
![01.png](https://exp-blog.com/safe/ctf/alert/level-02-adobe/imgs/01.png)
- payload.js : 下载
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