Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, the GET /api/v1/public-chatflows/:id endpoint returns the full chatflow object without sanitization for public chatflows. Docker validation revealed this is worse than initially assessed: the sanitizeFlowDataForPublicEndpoint function does NOT exist in the released v3.0.13 Docker image. Both public-chatflows AND public-chatbotConfig return completely raw flowData including credential IDs, plaintext API keys, and password-type fields. This vulnerability is fixed in 3.1.0.

Affected: npm: flowise

### Summary

The `GET /api/v1/public-chatflows/:id` endpoint returns the full chatflow object **without sanitization** for public chatflows. Docker validation revealed this is worse than initially assessed: the `sanitizeFlowDataForPublicEndpoint` function does NOT exist in the released v3.0.13 Docker image. Both `public-chatflows` AND `public-chatbotConfig` return completely raw flowData including credential IDs, plaintext API keys, and password-type fields.

### Root Cause

```typescript // packages/server/src/controllers/chatflows/index.ts:218-220 const chatflow = await chatflowsService.getChatflowById(req.params.id) if (!chatflow) return res.status(StatusCodes.NOT_FOUND).json(...) if (chatflow.isPublic) return res.status(StatusCodes.OK).json(chatflow) // ← NO sanitization! ```

### Docker Validation (v3.0.13)

Created public chatflow with credential IDs and passwords in flowData: ```json { "flowData": "{\"nodes\":[{\"data\":{\"credential\":\"e92a39bf-...\",\"inputs\":{\"password\":\"sk-supersecretkey123\",\"apiKey\":\"should-not-leak\"}}}]}" } ```

The `sanitizeFlowDataForPublicEndpoint` function only exists in unreleased HEAD, and even there, only `public-chatbotConfig` calls it — `public-chatflows` never does.

### Impact

- **Credential IDs** leaked — enables OAuth2 token theft chain (Finding 1) - **Plaintext API keys and passwords** leaked — direct third-party account compromise - **Node configurations** leaked — reveals internal architecture and endpoint URLs - Bot…

Ein Angreifer kann mehrere Schwachstellen in Flowise ausnutzen, um beliebigen Programmcode auszuführen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, und um Dateien zu manipulieren.