SQL injection is a major web app threat, often enabled by string-built queries. This article shows how Flask apps can block SQLi by using parameterized queries via SQLAlchemy/psycopg2, replacing unsafe concatenation. It explains the attack, rewrites a vulnerable example, and highlights benefits - stronger security, clearer code, and better performance - while urging continuous security best practices.
SQL injection is a pervasive threat that exploits dynamic SQL to steal or alter data and bypass auth. This article explains how concatenated input enables attacks, demonstrates an example, and shows how parameterized queries neutralize them by separating code from data. Adopting parameters boosts security, performance, and maintainability, with a real-world e-commerce refactor illustrating the payoff.
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