OWASP Top 10: Critical Web Application Security Risks
A developer-focused walkthrough of the OWASP Top 10 with code-level examples and actionable fixes for each risk category.
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Tags: security, owasp, best-practices
OWASP Top 10 2021: Explained With Code Examples The OWASP Top 10 is the most widely referenced security risk framework for web applications. Updated in 2021, it reflects the vulnerabilities most commonly found in production applications. This guide explains each category with a code example showing the vulnerable pattern and its fix. A01: Broken Access Control The most prevalent category in 2021, moved up from A05. Includes IDOR (Insecure Direct Object Reference), missing authorization checks, and path traversal. A02: Cryptographic Failures Sensitive data exposed due to weak/missing encryption: plaintext passwords, unencrypted PII in transit, weak TLS configuration, MD5 for passwords. Also check: Are you using TLS 1.2+? Is sensitive data encrypted at rest in the database? Are API keys…
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