Can token decryption endpoint response codes variability lead to security vulnerabilities?

To clarify the question, here’s our case:
We generate encrypted tokens by applying AES-CBC (256 bit) and Base64 to payload:
encrypted_token = Base64.encode(AES_CBC_256.encrypt(key, iv, payload)).
These encrypted tokens are publicly availab… Continue reading Can token decryption endpoint response codes variability lead to security vulnerabilities?