How to Catch Injection Security Vulnerabilities in Code Review

### Executive Summary This article explains injection vulnerabilities—principally Cross‑Site Scripting (JavaScript injection), SQL injection, and external control of file paths—rooted in missing input validation and sanitization; it gives practical code‑review guidance (e.g., HTML entity‑encoding, avoiding string interpolation in SQL,正确 ORM parameterization, and avoiding unsafe file path handling) and emphasizes that experienced human review is effective at finding these issues.