Package Instance

Improper Access Control
The Rails gem does not properly consider differences in parameter handling between the Active Record component and the JSON implementation, which allows remote attackers to bypass intended database-query restrictions and perform NULL checks or trigger missing `WHERE` clauses via a crafted request.

Nested attributes rejection proc bypass
When using the nested attributes feature in Active Record you can prevent the destruction of associated records by passing the `allow_destroy: false` option to the `accepts_nested_attributes_for` method. The `allow_destroy` flag prevents the `:reject_if` proc from being called because it assumes that the record will be destroyed anyway. However, this is not true if `:allow_destroy` is false so this leads to changes that would have been rejected being applied to the record. Attackers could set attributes to invalid values or clear all the attributes.