Fix SQL injection vulnerability in user registration#13
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Fix SQL injection vulnerability in user registration#13semgrep-code-studentsca023-rgb[bot] wants to merge 1 commit into
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Fix SQL injection vulnerability by using parameterized queries instead of string formatting in the user creation function. ## Changes - Replaced string formatting (`%s`, `%d`) with SQLite parameterized query placeholders (`?`) - Passed user inputs (`username`, `password`, `access_level`) as parameters to `query_db` instead of embedding them directly in the query string ## Why The original code used Python string formatting to construct the SQL query, which allows attackers to inject malicious SQL code through user-controlled inputs like `username` or `password`. By using parameterized queries, the database driver properly escapes all parameters, ensuring user input is treated as data rather than executable SQL code. ## Semgrep Finding Details Detected user input used to manually construct a SQL string. This is usually bad practice because manual construction could accidentally result in a SQL injection. An attacker could use a SQL injection to steal or modify contents of the database. Instead, use a parameterized query which is available by default in most database engines. Alternatively, consider using the Django object-relational mappers (ORM) instead of raw SQL queries. @267212124 requested Semgrep Assistant generate this pull request to fix [a finding](https://semgrep.dev/orgs/studentsca023_personal_org/findings/722169013) from the detection rule [python.django.security.injection.tainted-sql-string.tainted-sql-string](https://semgrep.dev/r/python.django.security.injection.tainted-sql-string.tainted-sql-string).
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Fix SQL injection vulnerability by using parameterized queries instead of string formatting in the user creation function.
Changes
%s,%d) with SQLite parameterized query placeholders (?)username,password,access_level) as parameters toquery_dbinstead of embedding them directly in the query stringWhy
The original code used Python string formatting to construct the SQL query, which allows attackers to inject malicious SQL code through user-controlled inputs like
usernameorpassword. By using parameterized queries, the database driver properly escapes all parameters, ensuring user input is treated as data rather than executable SQL code.Semgrep Finding Details
Detected user input used to manually construct a SQL string. This is usually bad practice because manual construction could accidentally result in a SQL injection. An attacker could use a SQL injection to steal or modify contents of the database. Instead, use a parameterized query which is available by default in most database engines. Alternatively, consider using the Django object-relational mappers (ORM) instead of raw SQL queries.
@267212124 requested Semgrep Assistant generate this pull request to fix a finding from the detection rule python.django.security.injection.tainted-sql-string.tainted-sql-string.