webPromedium

Lab 271 — TeamPulse — Stored XSS via HTML File Upload

hackadvisor

Task: collaborative project management app with file upload; HTML files served as text/html without sanitization, admin bot reviews uploads. Solution: upload HTML with JavaScript that reads admin's non-HttpOnly flag cookie and exfiltrates it via path-encoded Image beacons to Interaction Server.

file_upload nodejs xss stored_xss express html_injection admin_bot cookie_theft headless_chrome decoy_flag non_httponly_cookie interaction_server

admin_bot_exploitationdecoy_flag_eliminationnon_httponly_cookie_theftcookie_exfiltration_via_document_cookiestored_xss_via_html_file_uploadcontent_type_text_html_servingpath_based_data_exfiltrationinteraction_server_oob_callbacksame_origin_page_fetching

$ ls tags/ techniques/

file_upload nodejs xss stored_xss express html_injection admin_bot cookie_theft headless_chrome decoy_flag non_httponly_cookie interaction_server

Analysis

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

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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