> 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/dom/dom-based-open-redirection.md).
# 基于 DOM 的开放重定向
基于 DOM 的开放重定向笔记，适用于 PortSwigger Web Security Academy 实验室，包括利用流程、载荷测试、Burp Suite 验证和修复上下文。
### 基于 DOM 的开放重定向
该实验室在 DOM 端存在一个开放重定向漏洞。目标是利用此漏洞将受害者重定向到利用服务器。
**易受攻击的片段（返回博客按钮）**/ 评论区中与该按钮关联的动作代码是：
{% code overflow="wrap" %}
```javascript
onclick='returnUrl = /url=(https?:////.+)/.exec(location); location.href = returnUrl ? returnUrl[1] : "/"'
```
{% endcode %}
该脚本提取一个 `URL` 参数，并使用正则表达式从当前 URL 中提取其值；如果存在则重定向到该值；否则返回根路径（`/`).
**工作原理**/ 只需添加 `&URL=<目标>` 到帖子 URL 中。当用户点击“返回博客”时，脚本会恢复此参数，浏览器将被重定向到提供的目标。
**URL 示例**
{% code overflow="wrap" %}
```
https://0a9700fa04b783118073038f00bc00eb.web-security-academy.net/post?postId=1&url=https://jord4n.pro
```
{% endcode %}
* —— 加载后，点击返回博客会重定向到 `https://jord4n.pro`.
对于该实验室（直接到利用服务器）：
{% code overflow="wrap" %}
```
https://0a9700fa04b783118073038f00bc00eb.web-security-academy.net/post?postId=1&url=https://exploit-0abf00fb04aa83b480d502ca019900d1.exploit-server.net/
```
{% endcode %}
---
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