CVE-2020-37281
Gravitee API Management through 4.12.22 Default JWT Secret Authentication Bypass
- State
- Published
- Severity
- 9.2 Critical
- Published
- Oct 14, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 14, 2026
Description
Gravitee API Management through 4.12.22 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to impersonate any user by forging JWTs signed with the shipped default jwt.secret. Attackers knowing an existing user ID can sign an HS256 token with that subject and present it as a bearer token to the Management API, impersonating administrators to gain full platform control.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-1394 Use of Default Cryptographic Key
Affected Products
| Product | Versions |
|---|---|
Gravitee API ManagementGravitee |
|
References
- https://github.com/gravitee-io/issues/issues/4204issue-tracking
- https://github.com/gravitee-io/gravitee-api-management/blob/4.12.22/gravitee-apim-rest-api/gravitee-apim-rest-api-standalone/gravitee-apim-rest-api-standalone-distribution/src/main/resources/config/gravitee.yml#L636-L637technical-description
- https://github.com/gravitee-io/gravitee-api-management/blob/4.12.22/gravitee-apim-rest-api/gravitee-apim-rest-api-management/gravitee-apim-rest-api-management-security/src/main/java/io/gravitee/rest/api/management/security/config/BasicSecurityConfigurerAdapter.java#L157-L175technical-description
- https://github.com/gravitee-io/gravitee-api-management/blob/4.12.22/helm/values.yaml#L103technical-description
- https://github.com/gravitee-io/gravitee-docs/blob/master/pages/apim/3.x/how-tos/how-to-general-configuration.adoctechnical-description
- VulnCheck Advisory: Gravitee API Management through 4.12.22 Default JWT Secret Authentication Bypassthird-party-advisory
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