Is CVE-2025-51606 in the CISA KEV catalog?

No. CVE-2025-51606 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-51606?

CVE-2025-51606 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2025-51606?

CVE-2025-51606 has an EPSS score of 0.33% (24th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2025-51606

HIGH

8.8

CVSS v3

NVD

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.

CWE-798Hard-coded Credentials

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.33%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

https://github.com/ShenxiuSec/cve-proofs/blob/main/POC-20250610-01.md

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-08-22.