What vulnerabilities are found in Netlify apps?
Get instant answers about your app's security.
Short Answer
Netlify app scans surface the same cluster of vulnerabilities repeatedly: build-time secret exposure, deploy preview exposure, missing _headers file. The pattern is stable across Netlify versions.
Detailed Answer
The vulnerabilities actually found in Netlify apps
Not theoretical OWASP categories — specifically what appears when VAS, security researchers, and bug bounty hunters look at live Netlify deployments:
- **[CRITICAL]** **Build-Time Secret Exposure** *(high likelihood)*
Build-time env vars get baked into static HTML, visible to anyone.
*Fix:* Use Netlify Functions for runtime secrets. Never build-time for secrets.
2. **[MEDIUM]** **Deploy Preview Exposure** *(medium likelihood)*
Preview deployments expose unreleased features publicly.
*Fix:* Password-protect deploy previews in Site settings.
3. **[MEDIUM]** **Missing _headers File** *(high likelihood)*
Security headers not configured by default.
*Fix:* Create _headers file with CSP, X-Frame-Options, HSTS.
4. **[LOW]** **Form Spam Without Protection** *(medium likelihood)*
Netlify Forms are public endpoints vulnerable to spam.
*Fix:* Enable Akismet or reCAPTCHA on all forms.
5. **[MEDIUM]** **Function Timeout Attacks** *(low likelihood)*
10s timeout (26s paid) can be exploited for resource exhaustion.
*Fix:* Add rate limiting. Set appropriate timeout limits.
Distribution by severity
Of the findings above, 1 sit at critical impact (full data exposure), 0 at high (significant data or account compromise), and the rest are medium-or-lower (attack surface expansion). A first-scan Netlify app typically has 2–4 findings from this list live at any moment.
How to know which ones are in your app
Run a VAS scan. Each finding above is tested directly — we query your database to verify access controls are active, scan bundles for key patterns, probe auth endpoints for rate limiting, and check security headers in live responses. Output is a per-finding report with evidence and fix.
Security Research & Statistics
of Lovable applications (170 out of 1,645) had exposed user data in the CVE-2025-48757 incident
Source: CVE-2025-48757 security advisory
average cost of a data breach in 2023
Source: IBM Cost of a Data Breach Report 2023
developers using vibe coding platforms like Lovable, Bolt, and Replit
Source: Combined platform statistics 2024-2025
Expert Perspectives
“Vibe coding your way to a production codebase is clearly risky. Most of the work we do as software engineers involves evolving existing systems, where the quality and understandability of the underlying code is crucial.”
“The problem with AI-generated code isn't that it doesn't work - it's that it works just well enough to ship, but contains subtle security flaws that are hard to spot.”
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Get Starter ScanMore Questions About This Topic
How severe are the vulnerabilities typically found in Netlify apps?
Netlify apps lean critical: Build-Time Secret Exposure alone can expose the full user dataset in one query. That's a critical-impact finding with high likelihood — it is, in practice, the default state of an unscanned Netlify app. Compare to e.g. missing security headers (medium) which require additional exploitation. Triage accordingly: critical findings are measured in minutes-to-breach, mediums in weeks.
How do I fix vulnerabilities once they're found in my Netlify app?
Each finding comes with a specific fix. Example: for "Build-Time Secret Exposure" → Use Netlify Functions for runtime secrets. Never build-time for secrets. VAS exports these as markdown you can feed directly into Netlify's AI (or any other AI assistant) to apply the fix in-place. Re-scan afterward to confirm.
Can vulnerabilities in Netlify apps be exploited by a non-expert attacker?
Most can. Extracting an exposed API key is a single "view source" operation. Querying a table without RLS is a `curl` command. Exploiting missing rate limiting requires scripting skills equivalent to "follow a tutorial." Only a handful of the findings above (e.g., chained auth bypass) require specialist knowledge — the rest are routinely exploited by automated scanners with zero human involvement.
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