Vulnerability · Published Aug 21, 2025 · Assigned by mitre
CVE-2025-51606
High 8.8
In plain English
A high-severity hard-coded credentials in the cn.hippo4j:hippo4j-core package (Maven). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | cn.hippo4j:hippo4j-core | no fix listed | GHSA-48cg-9c55-j2q7 |
Affected products (as reported)
Weakness: CWE-798 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H