Python: Jinja2 Environment with autoescape=False
About A03:2021 — Injection
Injection happens when user input is concatenated directly into SQL queries, shell commands, HTML, or any other interpreter. Injection has appeared in every edition of the OWASP Top 10 since the first list in 2003, and ranked #1 in 2010, 2013 and 2017.
Impact: SQL injection: attacker reads or modifies your entire database. Command injection: attacker runs arbitrary shell commands on your server. XSS: attacker steals session cookies and impersonates other users. Each one is typically a critical-severity finding.
How to fix it: Always use parameterized queries (prepared statements) for SQL. Never use template literals or string concatenation with user input in queries. For HTML output, use your framework's auto-escaping. For shell commands, use APIs that take an array of arguments instead of `exec()` with a string.
Common patterns in this category:
- SQL queries built with string concatenation or template literals
- `child_process.exec()` called with user input concatenated into the command
- `dangerouslySetInnerHTML` with user-controlled data
- `eval()` or `Function()` called with user input
- `innerHTML` assignment without sanitization
Framework mapping
Findings from this rule map to the following framework controls. This is an informational mapping, not an audit, certification, or attestation.
See the full compliance coverage page for how every rule maps to OWASP Top 10 and CWE, and which rules also carry informational SOC 2 and ISO 27001 cross-references.
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