# Bypassing SOP with Iframes - 1
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## Iframes in SOP-1
In hierdie [**uitdaging**](https://github.com/terjanq/same-origin-xss) geskep deur [**NDevTK**](https://github.com/NDevTK) en [**Terjanq**](https://github.com/terjanq) moet jy 'n XSS in die gekodeerde
```javascript
const identifier = '4a600cd2d4f9aa1cfb5aa786';
onmessage = e => {
const data = e.data;
if (e.origin !== window.origin && data.identifier !== identifier) return;
if (data.type === 'render') {
renderContainer.innerHTML = data.body;
}
}
```
Die hoofprobleem is dat die [**hoofblad**](https://so-xss.terjanq.me) DomPurify gebruik om die `data.body` te stuur, so om jou eie html data na daardie kode te stuur, moet jy **bypass** `e.origin !== window.origin`.
Kom ons kyk na die oplossing wat hulle voorstel.
### SOP bypass 1 (e.origin === null)
Wanneer `//example.org` in 'n **sandboxed iframe** ingebed is, sal die bladsy se **origin** **`null`** wees, d.w.s. **`window.origin === null`**. So net deur die iframe in te bed via `