sequelize is an Object-relational mapping, or a middleman to convert things from Postgres, MySQL, MariaDB, SQLite and Microsoft SQL Server into usable data for NodeJS. A fix was pushed out that fixed potential SQL injection in sequelize 2.1.3 and earlier.

Affected: npm: sequelize

Affected versions of `sequelize` are vulnerable to SQL Injection when user input is passed into `findOne` or into a statement such as `where: "user input"`.

## Recommendation

Update to version 3.0.0 or later.

Version 3.0.0 will introduce a number of breaking changes. Thankfully, the project authors have provided a 2.x -> 3.x [upgrade guide](https://github.com/sequelize/sequelize/wiki/Upgrade-from-2.0-to-3.0) to ease this transition.

If upgrading is not an option, it is also possible to mitigate this by ensuring that all uses of `where: "input"` and `findOne("input")` are properly sanitized, such as by the use of a wrapper function.