Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck
CVE-2020-37281Gravitee API Management through 4.12.22 Default JWT Secret Authentication Bypass
High 8.1
In plain English
A high-severity security flaw in Gravitee API Management from Gravitee. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Gravitee | Gravitee API Management | 0 – through 4.12.22 |
Weakness: CWE-1394 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/gravitee-io/issues/issues/4204 issue-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-L637 technical-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-L175 technical-description
- https://github.com/gravitee-io/gravitee-api-management/blob/4.12.22/helm/values.yaml#L103 technical-description
- https://github.com/gravitee-io/gravitee-docs/blob/master/pages/apim/3.x/how-tos/how-to-general-configuration.adoc technical-description
- VulnCheck Advisory: Gravitee API Management through 4.12.22 Default JWT Secret Authentication Bypass third-party-advisory