CVE-2021-47663

CVSS 3.1 Score 8.1 of 10 (high)

Details

Published Apr 24, 2025
Updated: Apr 29, 2025
CWE ID 613

Summary

CVE-2021-47663 is a vulnerability in JSON Web Tokens implementation where an unauthenticated attacker can infer valid session IDs by guessing, subsequently allowing them to impersonate users and gain unauthorized access to the system. This issue can lead to serious security consequences, including full system compromise. Users and administrators are advised to update their JSON Web Token libraries as soon as possible to mitigate this risk.

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