cspshivam/playground
SSRF Level 5 / 6 Hard
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Blind Callback Proof

The response body is swallowed. Prove the server reached your target by driving it to a unique out-of-band host.

RSS feed importer

Submit a feed URL to import. The importer fetches it in the background and only ever replies "queued" — you never see the response. Prove the request actually fires.

Your out-of-band collaborator host

7e4379d3b84884be.oob.cspshivam-collab.test

Any request that reaches this host (or a subdomain of it) is logged for you.

The feed URL is pinned to this site and locked in the form; override the url field in the request body with an intercepting proxy to point it at your collaborator host.

This is an isolated, intentionally-vulnerable sandbox. Data here is fake and scoped to you. The rest of CSPSHIVAM Playground is not part of the target.