> 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/dom-xss-document-write-with-location-search.md).
# location.search を用いた DOM document.write XSS
PortSwigger Web Security Academy のラボ向けメモ。location.search を用いた DOM document.write 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。
### location.search をソースとして使用する document.write サンク内の DOM XSS
このラボには、検索クエリ追跡機能における XSS 側の DOM 脆弱性が含まれています。ページは `document.write` 〜からのデータを書き込むために `location.search` を DOM に書き込みます。これは URL で制御できます。
**脆弱性の説明**/ `document.write` は `location.search` サニタイズされていない文字列で呼び出されます。入力は URL から直接取得されるため、攻撃者は `location.search`.
**解決の目的** ページが読み込まれたときに `alert()` 関数を呼び出す DOM 側の XSS 攻撃を実行してください。
**コメント/ヒント**/ コードは次のような `` タグに `searchTerms` 引用符で囲まれたパラメータを含むものを生成します。例:
```html
```
タグを閉じて `` 、引用符も閉じれば、任意の HTML/JS コンテンツを挿入できます。
**テスト済みペイロードの例（提供済み）**/ タグを閉じて HTML を注入:
```html
">
hack
```
タグを閉じて、トリガーするスクリプトを注入 `alert`:
```javascript
">
```
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