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ENVCFG-010Medium severity-8 points

Wildcard CORS allowed origins in config

Part of Security, which counts for 30% of the overall score. When this check fires it deducts 8 points from that category, once per scan, no matter how many places it turns up.

What it detects

An allowed-origins config value is "*", so any website can make browser requests to the API. Combined with credentialed requests this exposes authenticated endpoints to cross-site abuse.

Why it matters

An allowed-origins value of "*" lets any website make browser requests to your API. If the API also allows credentials, a malicious page can read authenticated responses on behalf of a logged-in user. The wildcard is often copied in during debugging and then forgotten.

How to fix it

Set the allowed origins to the specific front-end origins that need access, read from an environment variable per environment. Never combine a wildcard origin with credentialed requests. Confirm requests from an unlisted origin are refused by the browser.

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