Instruction: Discuss the strategies and techniques you use to protect a Flask application from security vulnerabilities.
Context: This question evaluates the candidate's awareness and implementation of security measures to safeguard a Flask application against threats like SQL injection, XSS, and CSRF.
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SQL Injection: One of the most critical steps in securing a Flask application against SQL injection is to ensure that raw SQL queries are avoided whenever possible. Instead, I advocate for the use of ORM (Object Relational Mapping) libraries, such as SQLAlchemy, which Flask readily supports. ORMs inherently sanitize data, effectively neutralizing potentially harmful SQL code. Additionally, when raw SQL queries are unavoidable, parameterized queries or prepared statements are a must, as they segregate SQL code from data, significantly mitigating the risk of injection.
Cross-Site Scripting (XSS): XSS vulnerabilities expose applications to malicious script injections, which can be particularly insidious if not addressed properly. My approach involves rigorous input validation...