Bubble Security Guide
Complete guide to securing your Bubble.io application. Privacy rules, API security, and common vulnerabilities.
Critical Security Settings
Privacy Rules
Data > Privacy
Define who can view, find, and modify each data type. Without rules, all data may be publicly accessible.
API Workflow Authentication
Backend Workflows
API workflows can be called by anyone unless you require authentication.
API Data Exposure
Settings > API
The Data API exposes your database. Incorrect settings leak all your data.
Page Access Rules
Each page settings
Pages may be accessible to unauthenticated users by default.
Common Bubble Vulnerabilities
Privacy Rules Not Configured
CriticalData types without privacy rules expose all records to anyone with access to your API.
Go to Data > Privacy. Every type should have rules defined.
Add privacy rules to all data types. The 'Everyone else' rule should deny access by default.
API Workflows Without Auth
CriticalAPI endpoints without authentication can be called by anyone.
Check each Backend Workflow for the 'authentication required' setting.
Enable authentication requirement. Use API tokens for service-to-service calls.
Sensitive Data in Option Sets
HighOption set attributes are accessible to all users and can leak internal data.
Review option sets for sensitive information (pricing, internal IDs, etc.).
Move sensitive data to database types with proper privacy rules.
Client-Side Role Checks
HighHiding elements based on role without server-side enforcement.
Check if admin features have data-level privacy rules, not just UI hiding.
Add privacy rules that check user roles. Don't rely on conditional visibility.
Search Exposing All Data
MediumSearch functionality returning records the user shouldn't see.
Test search as different user types. Check what data appears in results.
Add ':filtered' constraints and ensure privacy rules apply to search results.
Bubble Security Checklist
data Privacy
- Every data type has privacy rules defined
- Default 'Everyone else' rule denies access
- Sensitive fields have field-level privacy
- Search/find operations respect privacy rules
- Option sets don't contain sensitive data
authentication
- Signup requires email verification
- Password requirements are configured
- Session timeout is appropriate
- Failed login attempts are limited
- Password reset flow is secure
api Security
- Data API is disabled (if not needed)
- API workflows require authentication
- API tokens are not hardcoded in workflows
- Rate limiting is configured
- CORS settings are restrictive
page Access
- Admin pages have access rules
- Authenticated pages redirect unauthenticated users
- URL parameters can't bypass security
- Direct URL access is controlled
Verify Your Bubble App's Security
VAS scans your deployed Bubble application for exposed data, authentication issues, and security misconfigurations.
Get Starter ScanFrequently Asked Questions
Are Bubble apps secure by default?
No. Bubble provides security features, but many are not enabled by default. Privacy rules are empty, API workflows don't require auth, and the Data API may be enabled. You must actively configure security for every data type and endpoint.
How do I check if my Bubble app has security issues?
1) Check Data > Privacy for all data types, 2) Review Backend Workflows for auth requirements, 3) Test your app's API by examining network requests, 4) Try accessing admin pages as a regular user, 5) Use VAS to scan your deployed app for vulnerabilities.
What's the biggest security mistake in Bubble?
Not configuring privacy rules. By default, all data is accessible. Many developers don't realize their user data, pricing, or business logic is exposed until someone exploits it. Always configure privacy rules before adding any real data.
Should I use Bubble for apps with sensitive data?
Bubble can handle sensitive data if properly configured. The key is understanding and correctly implementing privacy rules, authentication, and API security. For highly regulated data (healthcare, finance), ensure you understand compliance requirements and whether Bubble meets them.
How do privacy rules work in Bubble?
Privacy rules define who can view, find, and modify records of each data type. Rules are evaluated for every data operation. If no rule matches, the 'Everyone else' rule applies. Best practice: set 'Everyone else' to deny all access, then create specific rules for allowed cases.
Last updated: January 16, 2026