OWASP Top 10 Challenges
Cover every OWASP Top 10:2025 category with hands-on secure coding challenges. Your developers find and fix real vulnerabilities in the language they ship in — and you get evidence of capability, not just completion.
Hands-On Challenges for Every Category
The OWASP Top 10 is the industry benchmark for web application security — the list your auditors, customers and security team measure against. The 2025 edition adds Software Supply Chain Failures and Mishandling of Exceptional Conditions, and folds SSRF into Broken Access Control. Pick your language below: every challenge is a real application with a real vulnerability, and every verified fix becomes reportable evidence of secure coding capability.
OWASP Top 10 — the course
Learn each category through a real-world breach — from the Capital One SSRF to the Uber logging failure — then find the vulnerability in code, trace the exploit, and apply the fix. The fastest way to get a team started before they play the challenges.
What the OWASP Top 10 Covers
Broken Access Control
Users acting outside their intended permissions — the most common web application risk. The 2025 edition folds Server-Side Request Forgery into this category.
Security Misconfiguration
Insecure default configurations, verbose errors, exposed secrets and unhardened services — now the #2 web application risk.
Software Supply Chain Failures
New in 2025: compromises across dependencies, build systems and distribution infrastructure, expanded from Vulnerable and Outdated Components.
Cryptographic Failures
Weak or missing cryptography that exposes sensitive data: predictable randomness, poor key handling, and broken token generation.
Injection
Untrusted data interpreted as code or commands — SQL injection, command injection, log injection, XSS and friends.
Insecure Design
Security flaws baked into the design itself: missing rate limits, weak password policies, and logic that can be abused even when implemented "correctly".
Authentication Failures
Broken login, session and token handling that lets attackers assume other users’ identities.
Software or Data Integrity Failures
Code and data accepted without integrity verification: insecure deserialization, prototype pollution, and unsafe update mechanisms.
Security Logging and Alerting Failures
Missing, forgeable or unmonitored logs that let breaches go undetected. Renamed in 2025 to emphasise alerting.
Mishandling of Exceptional Conditions
New in 2025: improper error handling, fail-open logic and unexpected runtime states that attackers can force.
Turn the Standard Into a Training Program
Assign these challenges to your team as learning pathways, track verified fixes, and report OWASP Top 10 coverage to auditors, customers and the board — with evidence, not attendance sheets.