FundamentalsIntermediateFree lab
Fundamentals · browser room
XSS Attack
Intermediate85 ptsXSSWeb
Objective
Stored/reflected script execution vs encoding/CSP defense.
Cyber Flow Explorer · 3 steps · Network / Sequence / Packet / Code.
Isolated browser lab. Practice here first — no live targets. Optional deeper practice lives in the Academy library after you finish this room.
Answer panel
Challenge workspace
Complete the room tasks, then submit here to mark the room done.
CYNARKS|Cyber Flow Explorer
Teaching simulation · not live capture
XSS Attack
Lab app only.
1. Inject
Attackerpayload
Appreflect
Victimbrowser
Inject
Attacker submits a script payload into a vulnerable field.
<script>
- #1 attacker → app Inject <script>
Space · ← → · R restart
Hint
Treat output as hostile until encoded.
Why this is correct
Stop script execution with encoding and CSP.