Vulnerability details
CVE-2020-37281
Gravitee API Management
Gravitee API Management through 4.12.22 Default JWT Secret Authentication Bypass
CVSS 4.0
9.2Critical
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.2Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 8.1High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Gravitee | Gravitee API Management | v ≤ 4.12.22 | CVEProject cvelistV5 (CNA) |
References and advisories
6- 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
- https://www.vulncheck.com/advisories/gravitee-api-management-through-4.12.22-default-jwt-secret-authentication-bypass third-party-advisory
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Details
- Published
- 2026-10-14
- Last updated
- 2026-10-27
- State
- Published
- Assigner (CNA)
- VulnCheck
- Kolun priority
- 29 · Low
Exploit prediction (EPSS)
0.88%
Probability of exploitation in 30 days
59.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-1394Use of Default Cryptographic Key