| Package | Affected versions | Patched versions |
|---|---|---|
| activemodel | ≥ 4.1.0, < 4.1.14.1≥ 4.2.0, < 4.2.5.1 | 4.1.14.14.2.5.1 |
| rails | = 5.0.0≥ 4.1.0, < 4.1.14.1≥ 4.2.0, < 4.2.5.1 | 4.1.14.14.2.5.1 |
Active Model in Ruby on Rails 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 supports the use of instance-level writers for class accessors, which allows remote attackers to bypass intended validation steps via crafted parameters.
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