CVE-2025-51606 – Hippo4J JWT Secret Key Hard-Coded Vulnerability

The following table lists the changes that have been made to the
CVE-2025-51606 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Aug. 21, 2025

    Action Type Old Value New Value
    Added Description hippo4j 1.0.0 to 1.5.0, uses a hard-coded secret key in its JWT (JSON Web Token) creation. This allows attackers with access to the source code or compiled binary to forge valid access tokens and impersonate any user, including privileged ones such as “admin”. The vulnerability poses a critical security risk in systems where authentication and authorization rely on the integrity of JWTs.
    Added Reference https://github.com/ShenxiuSec/cve-proofs/blob/main/POC-20250610-01.md
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