Lab 215 — NestVault — 2FA Bypass via Incomplete Session Verification

hackadvisor

Task: Express.js financial platform with 2FA-protected admin account, credentials provided. Solution: Session cookie is issued after password verification but before 2FA completion; bypassed 2FA by directly accessing protected routes with the pre-2FA session cookie.

authentication broken_access_control session_management 2fa_bypass express_js

2fa_flow_bypassauthentication_bypassincomplete_session_verificationsession_cookie_abuse

$ ls tags/ techniques/

authentication broken_access_control session_management 2fa_bypass express_js

2fa_flow_bypassauthentication_bypassincomplete_session_verificationsession_cookie_abuse

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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