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Your code needs work
Must be fixed immediately
Should be addressed soon
Consider fixing
You're directly concatenating user input into SQL queries. This is security 101. An attacker could drop your entire database.
Database compromise, data loss
Easy fix - 10 minutes
const query = "SELECT * FROM users WHERE id = " + userId;
Your session check happens after the database query starts. A fast attacker could exploit this timing window.
Unauthorized access
Medium fix - 1 hour
You're loading the entire table into memory just to count rows. Use COUNT(*) instead.
Slow response times
Easy fix - 5 minutes
Use parameterized queries to prevent SQL injection attacks
| 1 | const query = "SELECT * FROM users WHERE id = " + userId; |
| 2 | db.execute(query); |
| 1 | const query = "SELECT * FROM users WHERE id = ?"; |
| 2 | db.execute(query, [userId]); |
Address all SQL injection and authentication vulnerabilities immediately
Your try-catch blocks are hiding errors instead of handling them properly
Replace inefficient queries with proper indexed lookups