CVE-2016-10556

Affected versions of `sequelize` cast arrays to strings and fail to properly escape the resulting SQL statement, resulting in a SQL injection vulnerability. ## Proof of Concept In Postgres, SQLite, and Microsoft SQL Server there is an issue where arrays are treated as strings and improperly escaped. Example Query: ``` database.query('SELECT * FROM TestTable WHERE Name IN (:names)', { replacements: { names: directCopyOfUserInput } }); ``` If the user inputs the value of `:names` as: ``` ["test", "'); DELETE TestTable WHERE Id = 1 --')"] ``` The resulting SQL statement will be: ```sql SELECT Id FROM Table WHERE Name IN ('test', '\'); DELETE TestTable WHERE Id = 1 --') ``` As the backslash has no special meaning in PostgreSQL, MSSQL, or SQLite, the statement will delete the record in TestTable with an Id of 1. ## Recommendation Update to version 3.20.0 or later.