The API vulnerabilities nobody talks about: excessive data exposure
TLDR: Excessive Data Exposure (leaking internal data via API responses) is the silent, pervasive threat that is more dangerous than single dramatic flaws like SQL Injection. It amplifies every other API vulnerability (like BOLA) and happens everywhere because developers prioritize speed over explicit data filtering. Fixing it means systematically checking hundreds of endpoints for unneeded PII and sensitive internal data.