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mission · xss-capstone-chain

Capstone: Session Hijack

The full chain. HackerMart's admin is logged in with a session cookie. 1) Plant a stored payload in the guestbook. 2) When the admin visits, it steals their cookie to your attacker panel. 3) Use the stolen cookie to hijack the admin's session — paste it into the hijack form. That's a complete XSS-based account takeover.

objective

Exfiltrate the admin's cookie AND use it to hijack their session.

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HackerMartGuestbookcart · 0
Guestbook

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attacker.hp-lab.local — listening
Exfiltration log

No requests captured yet. Plant a payload that calls fetch()…

Steal the admin's cookie first — it appears in the log above.
Simulated target for training. This page is the vulnerable website — payloads you craft execute here in your browser. Practice only on systems you own or are authorized to test.