> 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/stored-xss-in-html-context-without-encoding.md).

# エンコードなしのHTMLコンテキストにおける保存型XSS

PortSwigger Web Security Academy のラボ向けメモ。エンコードなしのHTMLコンテキストにおける保存型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。

### 何もエンコードされないHTMLコンテキストへの格納型XSS

これはブログのコメント機能に保存されるクロスサイトスクリプティングの脆弱性です。コメントフォームに入力されたデータは、エンコードされずにHTMLへ挿入されます。

#### ラボの目的

実行されるコメントを送信する `alert()` 投稿ページが表示されたときに（訪問者にアラートを表示させてラボを解決してください）。

```javascript
<script>alert("comments")</script>
<script>alert("name")</script>
<script>alert("email")</script>
<script>alert("website")</script>
```

<figure><img src="https://2001299964-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-080490211e728e60943f5a889a0619d3a1f48cbf%2F%7B245558FD-619C-425F-B299-038D4AEB2783%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

コメントフォームには脆弱性があります（送信されたフィールドがエンコードされずにHTML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-8998253af5d56a6c937ef8e09805c2bf5c740b83%2F%7B2F6F01C9-E40E-4B47-890B-C873C563CA47%7D.png?alt=media" alt=""><figcaption></figcaption></figure>


---

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