Securing a Bubble app requires configuring privacy rules on every Data Type, protecting API keys in the API Connector, preventing common web vulnerabilities, implementing rate limiting on sensitive actions, and conducting a thorough security review before going live. This tutorial provides a comprehensive security checklist covering data access, authentication, API security, and deployment hardening.
Overview: Making Your Bubble App Secure
This tutorial is a comprehensive security guide for Bubble apps. You will configure privacy rules, secure API credentials, prevent XSS and data exposure, add rate limiting, and follow a pre-launch security checklist.
Prerequisites
- A Bubble app with user authentication
- Understanding of Bubble Data Types and privacy rules
- At least basic familiarity with Bubble workflows
Step-by-step guide
Configure privacy rules on every Data Type
Configure privacy rules on every Data Type
Go to Data tab → Privacy for each Data Type. By default, all data is accessible to everyone. Add rules that restrict access: for User data, only the user themselves should see private fields. For content like Posts, anyone can view but only the author can modify. For sensitive data like payments, only the involved user and admins should have access. Key settings: 'Find this in searches' controls whether records appear in search results. Individual field visibility controls which fields are returned. Remember: when multiple rules apply, access is granted if ANY rule allows it.
Pro tip: Always test privacy rules by using 'Run as' with a non-admin user account. Admin accounts may bypass rules, giving a false sense of security.
Expected result: Every Data Type has explicit privacy rules controlling who can find, view, create, modify, and delete records.
Secure API keys and credentials
Secure API keys and credentials
Never put API keys directly in page elements, workflows, or HTML elements where they are visible to users. All API keys should be stored in the API Connector with the Private checkbox checked. For third-party services, use backend workflows (which run server-side) instead of frontend workflows for API calls with sensitive credentials. Bubble's request body IS sent to the user's browser — never include secrets in request bodies that are not marked Private. Review your API Connector configuration and ensure every sensitive value is marked Private.
Expected result: All API keys and credentials are stored securely and never exposed to client-side code.
Prevent data exposure and XSS vulnerabilities
Prevent data exposure and XSS vulnerabilities
Bubble handles most XSS prevention automatically, but take extra care with HTML elements — never render user-generated content directly in HTML elements without sanitization. Data Type structure (names, field names, types) is visible in the app's JavaScript files, so never use sensitive information in type or field names. Hidden elements still have their static content accessible to tech-savvy users — never place sensitive data in hidden elements. Use conditions to prevent loading sensitive data rather than just hiding it visually.
Expected result: Your app does not expose sensitive data through HTML elements, hidden elements, or data type naming.
Add rate limiting on sensitive actions
Add rate limiting on sensitive actions
Prevent abuse by limiting how often users can perform sensitive actions. Create a RateLimit Data Type with fields: user (User), action (text), timestamp (date). Before sensitive actions (login attempts, password resets, API calls), search for recent RateLimit records for this user and action. If the count exceeds your threshold (e.g., 5 attempts in 10 minutes), block the action and show an error. For login, this prevents brute-force attacks. For form submissions, it prevents spam.
Expected result: Sensitive actions are rate-limited to prevent brute-force attacks and abuse.
Conduct a pre-launch security review
Conduct a pre-launch security review
Before going live, run through this checklist: (1) Privacy rules set on every Data Type. (2) All API keys marked Private. (3) No sensitive data in HTML elements, hidden elements, or Data Type names. (4) Rate limiting on login, signup, and password reset. (5) HTTPS enforced (automatic on Bubble). (6) Custom domain SSL verified. (7) Test with a non-admin user to verify access restrictions. (8) Review all exposed API endpoints. (9) Enable Bubble's Security Dashboard if available. (10) Remove test data and unused test accounts.
Expected result: Your app passes a comprehensive security review and is ready for production use.
Complete working example
1BUBBLE APP SECURITY CHECKLIST2===============================341. PRIVACY RULES:5 □ Every Data Type has explicit privacy rules6 □ User data: only self can view private fields7 □ Content: anyone reads, only author modifies8 □ Payments: only involved user + admin9 □ Tested with non-admin 'Run as' user10112. API KEY SECURITY:12 □ All keys in API Connector marked Private13 □ No keys in HTML elements or page content14 □ Backend workflows for sensitive API calls15 □ No secrets in Data Type names or field names16173. DATA EXPOSURE PREVENTION:18 □ No user-generated HTML rendered unsanitized19 □ No sensitive data in hidden elements20 □ Conditional data loading (not just hiding)21 □ Data Type names do not reveal sensitive info22234. RATE LIMITING:24 □ Login: max 5 attempts per 10 minutes25 □ Password reset: max 3 per hour26 □ Signup: max 3 per hour per IP27 □ API endpoints: configurable limits28295. PRE-LAUNCH:30 □ HTTPS enforced (automatic)31 □ Custom domain SSL verified32 □ Test data removed33 □ Unused test accounts deleted34 □ All API endpoints reviewed35 □ Security Dashboard enabled (if available)Common mistakes when securing a Bubble app
Why it's a problem: Leaving default privacy rules (no restrictions) on Data Types
How to avoid: Add explicit privacy rules to every Data Type restricting access based on ownership, roles, and relationships
Why it's a problem: Hiding sensitive data with element visibility instead of privacy rules
How to avoid: Use privacy rules to prevent sensitive data from being sent to the browser at all, not just hidden visually
Why it's a problem: Testing security only with admin accounts
How to avoid: Always test with a regular non-admin user account using Bubble's 'Run as' feature
Best practices
- Set explicit privacy rules on every Data Type before going live
- Mark all API keys and secrets as Private in the API Connector
- Use backend workflows for sensitive API calls
- Add rate limiting on authentication and sensitive actions
- Test security with non-admin user accounts
- Never store sensitive information in Data Type names or field names
- Use conditional data loading rather than visual hiding for sensitive content
- Review the security checklist before every major deployment
Still stuck?
Copy one of these prompts to get a personalized, step-by-step explanation.
I am about to launch my Bubble.io app and want to make sure it is secure. Can you provide a comprehensive security checklist covering privacy rules, API key protection, data exposure prevention, and rate limiting?
Review my app's security: check that privacy rules are set on all Data Types, API keys are marked Private in the API Connector, no sensitive data is in HTML or hidden elements, and rate limiting is configured for login and signup actions.
Frequently asked questions
Does Bubble encrypt data at rest?
Yes. Bubble's database runs on Amazon RDS with AES-256 encryption. All data is encrypted at rest and in transit (HTTPS).
Can users access my database directly?
Not directly, but Bubble's Data API and JavaScript files expose Data Type structure. Privacy rules control which actual data is accessible per user.
Is Bubble SOC 2 certified?
Bubble has SOC 2 Type II certification. Enterprise plans offer additional security features including dedicated infrastructure and regional data hosting.
How do I prevent brute-force login attempts?
Create a rate limiting system that tracks failed login attempts per user or IP address and temporarily blocks access after too many failures.
Can RapidDev help secure my Bubble app?
Yes. RapidDev can conduct a comprehensive security audit, configure privacy rules, implement rate limiting, secure API integrations, and ensure your Bubble app meets production security standards.
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