pentester.land· Nov 17, 2021· by David Schütz (@xdavidhu)💰 Bounty: 10,401.1

URL whitelist bypass in https://cxl-services.appspot.com

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Target Program: Google
🎯 Vulnerability: Server-Side Request Forgery (SSRF)
💡 Defense Fix: Enforce URL whitelisting, block private IP ranges (10.0.0.0/8, 169.254.169.254), and mandate AWS IMDSv2 headers.
#Privilege escalation#URL validation bypass#SSRF