Hippo4j up to 1.5.0 JSON Web Token hard-coded key

CVSS Meta Temp Score
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CTI Interest Score
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2.5$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Hippo4j up to 1.5.0. Affected by this vulnerability is an unknown functionality of the component JSON Web Token Handler. Performing a manipulation results in hard-coded key. This vulnerability is identified as CVE-2025-51606. There is not any exploit available.

Detailsinfo

A vulnerability was found in Hippo4j up to 1.5.0. It has been classified as problematic. This affects some unknown processing of the component JSON Web Token Handler. The manipulation with an unknown input leads to a hard-coded key vulnerability. CWE is classifying the issue as CWE-321. The use of a hard-coded cryptographic key significantly increases the possibility that encrypted data may be recovered. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-51606 since 06/16/2025. The exploitability is told to be difficult. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-25521). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.6
VulDB Meta Temp Score: 2.5

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Hard-coded key
CWE: CWE-321 / CWE-320
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/16/2025 CVE reserved
08/21/2025 +66 days Advisory disclosed
08/21/2025 +0 days VulDB entry created
08/22/2025 +1 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2025-51606 (🔒)
GCVE (CVE): GCVE-0-2025-51606
GCVE (VulDB): GCVE-100-320991
EUVD: 🔒

Entryinfo

Created: 08/21/2025 22:42
Updated: 08/22/2025 17:54
Changes: 08/21/2025 22:42 (51), 08/22/2025 17:54 (1)
Complete: 🔍
Cache ID: 216::103

Submitinfo

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