webPromedium

Lab 292 — TeamPulse — CSRF to Stored XSS Chain

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Task: TeamPulse exposes a CSRF-prone ticket API and renders sanitized rich HTML for an admin bot. Solution: a malformed script closing tag bypasses the custom sanitizer, then same-origin replies exfiltrate the admin's readable flag cookie.

nodejs xss stored_xss cookie_stealing express admin_bot decoy_flag same_origin_exfiltration sanitizer_bypass custom_sanitizer malformed_html script_tag

admin_bot_exploitationdecoy_flag_avoidancesame_origin_cookie_exfiltration_via_ticket_replystored_xss_via_malformed_script_closing_taghtml5_parser_malformed_endtag_tolerancecustom_sanitizer_regex_bypassurlsearchparams_to_avoid_sanitizer_false_positive

$ ls tags/ techniques/

nodejs xss stored_xss cookie_stealing express admin_bot decoy_flag same_origin_exfiltration sanitizer_bypass custom_sanitizer malformed_html script_tag

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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