Lab 69 — TeamPulse — Reflected XSS in OAuth2 Error Callback

hackadvisor

Task: TeamPulse collaboration dashboard with OAuth2 CloudID integration and bug bounty program. Reflected XSS in OAuth callback error_description parameter. Solution: Crafted XSS payload to steal admin cookies via in-band exfiltration using application's own notes API, bypassing external webhook restrictions.

xss cookie_stealing reflected_xss oauth2 bug_bounty

cookie_exfiltrationreflected_xss_exploitationoauth_callback_injectionin_band_exfiltration

$ ls tags/ techniques/

xss cookie_stealing reflected_xss oauth2 bug_bounty

cookie_exfiltrationreflected_xss_exploitationoauth_callback_injectionin_band_exfiltration

Analysis

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

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