> 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-vulnerabilities/json-web-token-jwt-attack/jwt-pivoting-user-pentesting-web.md).
# Pivotamento de usuário via JWT
## JWT-null:
Nos autenticamos como um **usuário normal** "usuário" com privilégios de *convidado*:
Observamos que temos um **cookie de sessão** em JWT:
Do **terminal**, traduzimos em **base64** o "Header" e o "Payload" ao alterar o número de identificação, então removemos a "Verify signature":
Colamos o novo **cookie de sessão** e obtemos privilégios de *normal*:
## JWT-secret
Ao testar o método JWT null, isso **não funcionaria** e a tentativa falharia.
A ideia seria tentar senhas no **Verificar assinatura**, com brute force ou alguma engenharia reversa para obter o cookie:
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