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Secure development basics: the OWASP Top 10 in practice

For developers, automation engineers and IT staff who write or review scripts, internal web tools or APIs. You should be able to read simple Python or JavaScript; you don't need security experience. Uses the OWASP Top 10:2025 categories (with the 2021 numbering alongside, since many tools still use it) and turns the most common ones into things you can spot in code review: injection, broken access control, secrets and weak password storage, authentication flaws, misconfiguration, risky dependencies and unsafe error handling.

Level
Intermediate
Length
About 85 minutes
Contents
5 lessons · final exam
Status
Published · updated 10 Oct 2026
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Skills you'll practise

  • Identify injection flaws in code that builds SQL or shell commands from user input, and choose a parameterized fix
  • Identify missing authorization checks where a user-supplied identifier selects a record
  • Choose acceptable password storage and secret handling, and write login and error messages that don't leak details while logging them server-side
  • Identify security misconfiguration and risky dependencies in configuration files and dependency scan output
  • Match code review findings to their OWASP Top 10:2025 category

Course outline

  1. 1.The Top 10 as a code reviewer's mapLesson · 10 min
  2. 2.Injection: SQL and shell commands built from user inputLesson · 12 min
  3. 3.Broken access control: missing authorization checks on recordsLesson · 8 min
  4. 4.Secrets, password storage, login and error messagesLesson · 18 min
  5. 5.Security misconfiguration, risky dependencies and a review checklistLesson · 14 min
  6. 6.Secure development basics: the OWASP Top 10 in practice: knowledge checkKnowledge check · 14 questions
  7. 7.Secure development basics: the OWASP Top 10 in practice: practical exerciseKnowledge check · 1 question
  8. 8.Final exam10 questions · passing it completes the course, so people who already know the material can test out

Sources it draws on

The lessons and questions are written from these references, so learners can go back to the original.

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