Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the OAuth2 token refresh endpoint POST /api/v1/oauth2-credential/refresh/:credentialId is unauthenticated by design and performs a server-side HTTP request to the credential-controlled accessTokenUrl without SSRF protections. Runtime validation confirmed that the endpoint was reachable without authentication, triggered outbound POST requests to an attacker-controlled server, reflected the full remote response body to the caller through tokenInfo, and sent client_id, client_secret, grant_type=refresh_token, and refresh_token in the request body. This issue is fixed in version 3.1.3.
| Version | Type | Source | Base | Exp | Imp |
|---|---|---|---|---|---|
| 4.0 | Primary | cve.org | 8.5 | — | — |
| 4.0 | Secondary | GHSA | 8.5 | — | — |
| 4.0 | Secondary | NVD | 8.5 | — | — |
| 4.0 | Secondary | ENISA EUVD | 8.5 | — | — |