Last updated: April 29, 2026
The most dangerous phrase in modern web security is “the framework handles that.” Rails handles CSRF tokens. Django handles SQL injection. React handles XSS. Spring handles authorization. Each of these statements is partially true and completely dangerous. This module is about where framework defenses end and developer responsibility begins — the gap where modern vulnerabilities live.
Why this happens
Modern frameworks absorb the responsibility for the most common security patterns. This was a net win for web security: CSRF tokens everywhere, SQL injection largely dead in ORM-using apps, XSS mostly blocked in modern SPA defaults. The cost: developers stopped thinking about security because the framework “handles it.”
But frameworks handle the default case. The non-default case — anywhere you opt out, use escape hatches, integrate with a third party, or step outside the framework’s paved path — is your responsibility again, without the habitual attention that produces good decisions. Vulnerabilities concentrate at these junctions.
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