> 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-vulnerabilities/deserialization-yaml-attack/des-yaml-base64-url-pentesting-web.md).
# YAML 反序列化 Base64 URL
在 **URL**，描述中显示的内容被编码为 **base64**:
如果我们对 base64 的英文文本进行解码，我们会看到这确实与以下文本一致：
我们进行一次测试，以验证我们是否能够 **修改此内容** 从我们这边。需要添加“yaml:”】【：
然后我们尝试注入命令，在这种情况下 **id** 命令，如下所示：
```bash
yaml: !!python/object/apply:subprocess.check_output ['id']
```
---
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