CORS: What is it protecting?

CORS: What is it protecting? | Engineering Notes

CORS is a browser security mechanism, not a server one. What the Origin header and preflight checks actually do, what CORS protects against, and why it is not CSRF protection.

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ryokimball@infosec.pub
9 hours
Absolutely NOTHING! Good God, y’all.
- ryokimball@infosec.pub
  55 minutes
  I deserve the downvotes, not even mad.

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