Sort of. In fact, JWT is used in the application for authentication. We store data about the user in the token, and we make a request to the API with the token in the headers to get information about his access-level. The endpoint verifies the signature, decodes the data, does some processing, and spits back the information we want.
The problem is that it still relies on the backend to verify the signature (does it not? Legit question, this is how I learned it). Since the attacker can change the information that is coming back from the API, he could just make it say "yup, das legit bro, he is an admin", and be allowed in pages he wasn't supposed to be in, even if this only gives him very limited access to actual data.
Still, the guys upstairs did not like this, and I was tasked with fixing it.
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Sort of. In fact, JWT is used in the application for authentication. We store data about the user in the token, and we make a request to the API with the token in the headers to get information about his access-level. The endpoint verifies the signature, decodes the data, does some processing, and spits back the information we want.
The problem is that it still relies on the backend to verify the signature (does it not? Legit question, this is how I learned it). Since the attacker can change the information that is coming back from the API, he could just make it say "yup, das legit bro, he is an admin", and be allowed in pages he wasn't supposed to be in, even if this only gives him very limited access to actual data.
Still, the guys upstairs did not like this, and I was tasked with fixing it.