CVE-2025-13877

### Impact CVE-2025-13877 is an **authentication bypass vulnerability caused by insecure default JWT key usage** in NocoBase Docker deployments. Because the official one-click Docker deployment configuration historically provided a **public default JWT key**, attackers can **forge valid JWT tokens without possessing any legitimate credentials**. By constructing a token with a known `userId` (commonly the administrator account), an attacker can directly bypass authentication and authorization checks. Successful exploitation allows an attacker to: - Bypass authentication entirely - Impersonate arbitrary users - Gain full administrator privileges - Access sensitive business data - Create, modify, or delete users - Access cloud storage credentials and other protected secrets The vulnerability is **remotely exploitable**, requires **no authentication**, and **public proof-of-concept exploits are available**. This issue is functionally equivalent in impact to other JWT secret exposure vulnerabilities such as **CVE-2024-43441** and **CVE-2025-30206**. Deployments that used the default Docker configuration without explicitly overriding the JWT secret are affected. --- ### Patches ✅ The vulnerability has been **fully patched** through a secure JWT key management redesign. The remediation enforces the following security guarantees: - JWT secrets are no longer allowed to fall back to public default values. - Secrets must either: - Be explicitly provided by the user, or - Be securely generated using cryptographically strong randomness at first startup. - Generated secrets are persisted securely with restricted filesystem permissions. - Invalid or weak secret values immediately trigger a startup failure. ✅ Fixed Versions: - **NocoBase ≥ 1.9.23** - **NocoBase ≥ 1.9.0-beta.18** - **NocoBase ≥ 2.0.0-alpha.52** --- ### Workarounds If upgrading is not immediately possible, the following temporary mitigations **must** be performed to reduce risk: 1. Explicitly set a **strong, randomly generated JWT secret** via environment variables `APP_KEY`. 2. **Restart all running NocoBase instances** so the new secret takes effect. 3. **Invalidate all existing JWT sessions**, forcing complete user re-authentication. 4. Verify that **no default secret values** are present in: - `docker-compose.yml` - `.env` files - Kubernetes Secrets --- ### References - **CVE Record:** CVE-2025-13877 - **VulDB Entry:** https://vuldb.com/?id.334033 - **Public Exploit Proof:** https://gist.github.com/H2u8s/f3ede60d7ecfe598ae452aa5a8fbb90d - **Affected Default Docker Configurations:** - https://github.com/nocobase/nocobase/blob/main/docker/app-mysql/docker-compose.yml#L13 - https://github.com/nocobase/nocobase/blob/main/docker/app-mariadb/docker-compose.yml#L13 - https://github.com/nocobase/nocobase/blob/main/docker/app-postgres/docker-compose.yml#L11 - https://github.com/nocobase/nocobase/blob/main/docker/app-sqlite/docker-compose.yml#L11 - **Official Deployment Documentation:** - https://docs.nocobase.com/welcome/getting-started/installation/docker-compose - https://v2.docs.nocobase.com/get-started/installation/docker