IS BUBBLE SAFE? SECURITY ANALYSIS | VIBEEVAL

Visual Complexity Hides Security Gaps

Bubble’s visual builder makes it easy to ship a real application without writing code. The same visual layer hides the security model — Privacy Rules, API workflow auth, plugin scopes, and conditional visibility all live in different parts of the editor, and a misconfiguration in one is invisible from the others. Most Bubble apps we audit have at least one data type with no Privacy Rules at all, which means the entire table is readable via the Data API.

The platform itself is solid: SOC 2 Type II, encrypted at rest, dedicated infrastructure on higher plans, and a well-documented permission model. The findings are configuration findings: missing Privacy Rules, exposed API workflows, plugin permissions wider than the plugin needs, and “hidden” UI elements that aren’t actually hidden from the network response.

Common Security Issues

Missing Privacy Rules

This is the headline finding. Every data type in your Bubble app needs explicit Privacy Rules. The default state is “no rules,” which means the entire table is readable by anyone — including via the public Data API at https://yourapp.bubbleapps.io/api/1.1/obj/<datatype>.

# Test for it from a logged-out browser tab
curl https://yourapp.bubbleapps.io/api/1.1/obj/user
# If this returns user records, you have no Privacy Rules

The minimum acceptable rule set per data type:

• Users: Current User is This User for sensitive fields. Restrict email, phone, and any internal flags.
• Owned records (orders, posts, etc.): Current User is This <Type>'s creator for read/write.
• Admin tables: Current User's role is "admin" for read; usually no rule that allows external write at all.
• Public catalogs: explicit “Everyone can view” rule, with field-level restrictions on internal fields.

Privacy Rules apply to every access path: pages, workflows, API endpoints, the Data API, and search results. There’s no “this is just for the page” exception — get the rule right once.

Exposed API Workflows

API workflows can be triggered via HTTP. By default, an API workflow with the “Expose as a public API workflow” toggle is reachable by anyone who knows the URL. The URL is guessable (/api/1.1/wf/<workflow-name>) and frequently shows up in browser network logs.

Set “This workflow can be run without authentication” to off for any sensitive operation. For workflows that legitimately need to be public (a payment webhook, a contact form), validate the request signature inside the workflow before doing anything destructive.

Plugin Vulnerabilities

Third-party plugins run with the same access as the main app. A plugin can:

• Read every data type the app can read.
• Make outbound HTTP calls with the app’s credentials.
• Inject custom JavaScript into pages where it’s used.

Audit installed plugins quarterly. Remove any you’re not actively using. For high-trust apps, prefer first-party Bubble plugins over community ones, and pin to a specific plugin version so an upstream change doesn’t silently expand the plugin’s scope.

Client-Side Logic Is Not Security

The pattern: a designer hides the “Admin” tab with a conditional visibility rule (Only when Current User's role is admin). The element is hidden in the rendered page. The data behind it is still in the Data API and the workflow is still callable.

Conditional visibility is a UX feature, not a security feature. Anything sensitive needs:

1. A Privacy Rule on the underlying data type.
2. An auth check inside the workflow that touches the data.
3. (Defense in depth) Conditional visibility so the UI matches reality.

Skip steps 1 and 2 and the “hidden” admin panel is one DevTools tab away.

Search and Sort Leakage

A search element configured with no constraint that respects Privacy Rules will return everything the current user is allowed to see by Privacy Rules. If the rules are too permissive, the search becomes a data exfiltration tool. This is the most common way Privacy Rule misconfigurations get discovered in the wild — a casual user notices “huh, this search returns more than I expected.”

Common Mistakes We See in Audits

• Data types with zero Privacy Rules, exposing the full table via Data API.
• API workflows toggled to “expose as public” without auth checks.
• Conditional visibility used as the only gate on admin features.
• Plugins installed for one feature and granted full app scope, never reviewed again.
• The User data type with no field-level restriction, exposing email and phone to anyone who can read the user.
• Backend workflows scheduled with Recursive that read every record, with no Privacy Rules to constrain.
• Custom HTML embeds rendering user-supplied content via innerHTML.
• Test/staging apps with copies of production data and weaker Privacy Rules.

Comparison vs Webflow

• Bubble is a full no-code app builder with a database, workflows, and APIs. Larger surface area; security dominated by Privacy Rules and workflow auth.
• Webflow is a static site builder with optional Memberships. Smaller surface area; security dominated by custom code and third-party embeds.

Pick Bubble when you need real application logic and are willing to invest in Privacy Rules discipline. Pick Webflow when “marketing site + a few forms + a member area” describes the project. They are not interchangeable.

Comparison vs Code-First

A Bubble app with disciplined Privacy Rules is comparable in security posture to a Postgres + RLS + custom-API stack. The Bubble version is faster to ship and harder to audit (no git diff of Privacy Rule changes). The code-first version is slower to build and easier to put under standard code-review gates. For internal tools with <10 users, Bubble’s trade is usually right. For B2B products with regulated customers, the audit story matters.

Enterprise Considerations

• SSO: SAML SSO available on higher plans. Enforce it for the editor org so designers/builders can’t sign in via personal email.
• Audit Logs: Application Logs and Server Logs are available; export and ship to a SIEM for retention.
• Compliance: SOC 2 Type II; dedicated infrastructure on higher tiers helps with regulated workloads. HIPAA support requires Dedicated plan and a BAA — confirm with their team.
• Privacy Rule diff: There’s no built-in change history for Privacy Rule edits at the editor level beyond the version control feature. Use Bubble’s version control and require approvals before merging to live.
• API key rotation: API tokens for the Data API can be rotated. Build it into your secret rotation cadence.
• Plugin pinning: Pin plugin versions on production apps so an upstream plugin update doesn’t change behavior unexpectedly.

Security Assessment

Strengths

• • Handles infrastructure security (SOC 2 Type II)
• • Built-in user authentication with secure password hashing
• • HTTPS on all apps with managed certificates
• • Privacy Rules system for data access control
• • Regular platform security updates
• • Version control and dev/live environment separation
• • Dedicated infrastructure available on higher plans

Concerns

• • Privacy Rules default to permissive; missing rules expose tables via Data API
• • API workflows may be unprotected if “public” is toggled without auth
• • Complex permission logic across many data types is error-prone
• • Plugins may introduce vulnerabilities and have wide scope
• • Client-side conditional visibility is routinely misused as security
• • No built-in diff/audit for Privacy Rule changes
• • Search elements can amplify minor Privacy Rule misconfigurations

The Verdict

Bubble as a platform is safe and well-engineered. Bubble applications frequently have security issues because the visual builder hides the security model and Privacy Rules default to permissive. The fix is discipline: Privacy Rules on every data type, auth checks on every API workflow, plugins reviewed and version-pinned, and conditional visibility treated as UX not security. Apps that follow this discipline are comparable in posture to a code-first stack. Apps that don’t are usually one casual curl away from a data leak.

Related Resources

How to Secure Bubble

Step-by-step guide covering Privacy Rules per data type, API workflow auth, plugin audit, and the launch-blocker checklist.

Bubble Security Checklist

Interactive checklist for the missing-Privacy-Rules, exposed-workflow, and plugin-scope items that account for most findings.

Is Webflow Safe?

Side-by-side analysis of the two leading no-code platforms — when each is appropriate and what their failure modes look like.

Scan Your Bubble App

Let VibeEval scan your Bubble application for security vulnerabilities — including the missing-Privacy-Rule, exposed-API-workflow, and conditional-visibility-bypass patterns that account for most incidents on the platform.