> 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/ja/web/xss/reflected-xss-in-html-without-encoding.md).

# エンコードなしのHTML内で反射されるXSS

PortSwigger Web Security Academy のラボ向けメモ。エンコードなしのHTML内で反射されるXSSに関するもので、攻撃手順、ペイロードのテスト、Burp Suite による検証、および対策の文脈を含む。

### エンコードされていない HTML コンテキストへの反射型 XSS

このラボには、検索機能に基本的な反射型 XSS 脆弱性があります。アプリケーションが返す文字列は、何の変換もされずに HTML コンテキストへ挿入されます。

<figure><img src="https://2001299964-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-378207365a11803d319fc3628c3fde0dd2e7077e%2F%7B8806A36C-D64A-499F-BA3D-B13ADA10D4EA%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

#### ペイロードの例

反射型 XSS 攻撃で脆弱性を悪用し、実行する `alert` 関数。

```javascript
<script>alert("xss")</script>
```

<figure><img src="https://2001299964-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-6e3af69e6af35aab8cf3d0942062959d079b3a93%2F%7B1AE0AB9D-873F-4724-895A-EF8F10A8CC78%7D.png?alt=media" alt=""><figcaption></figcaption></figure>


---

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