Breaking the "KPMG CTF 2025 Hardest Mobile Challenge": A Deep Dive into VaultPass v2 How I exploited Firebase misconfigurations and hardcoded credentials to solve KPMG CTF’s most challenging mobile …

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A detailed walkthrough of solving KPMG CTF 2025's advanced mobile security challenge by reverse engineering an Android APK, discovering hardcoded Firebase credentials, exploiting authentication misconfigurations to bypass database security rules, and ultimately retrieving the flag through a chain of vulnerabilities including credential exposure and anonymous authentication bypass.

Breaking the "KPMG CTF 2025 Hardest Mobile Challenge": A Deep Dive into VaultPass v2

Phase 1: APK Reverse Engineering — Peeling Back the Layers

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Phase 2: The “Almost Protect” Phenomenon

Firebase Database Properly Secured… Almost