> 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/dom-xss-with-innerhtml-and-location-search.md).
# XSS DOM com innerHTML e location.search
Notas sobre XSS DOM com innerHTML e location.search para laboratórios da PortSwigger Web Security Academy, incluindo fluxo de exploração, teste de payloads, validação no Burp Suite e contexto de remediação.
### DOM XSS no destino innerHTML usando a origem location.search
Vulnerabilidade de DOM XSS no recurso de busca do blog. O código recupera o valor de `location.search` e o insere diretamente no DOM via `innerHTML`, permitindo que JavaScript seja injetado e executado quando o valor vem da URL.
**Trecho do código observado**
```javascript
function doSearchQuery(query) {
document.getElementById('searchMessage').innerHTML = query;
}
var query = (new URLSearchParams(window.location.search)).get('search');
if(query) {
doSearchQuery(query);
}
```
**Cargas úteis testadas**
* Carga útil simples (não interpretada): / ``
* Teste para inserir um elemento de imagem:/ ``/ (isso não aciona a execução de script, pois nenhum atributo de evento está presente)
Forçar erro de carregamento para acionar um `onerror` tratador:/ `` / (Esta carga útil usa o `onerror` atributo de evento para executar `alerta` quando o carregamento da imagem falha)
```javascript
```
O script afeta diretamente `innerHTML` com a `parâmetro de busca` o valor da URL; portanto, fragmentos HTML contendo manipuladores de evento (por ex. `onerror`) ou tags executáveis podem levar à execução de código. A `` carga útil causa um erro de carregamento e executa `alert("XSS")`, demonstrando a vulnerabilidade de DOM XSS.
---
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