# CVE-2019-5421: ruby-devise: Plataformatec Devise version 4.5.0 and earlier, using the lockable module contains a CWE-367 vulnerability in The `De...

CVE-2019-5421 is fixed in ruby-devise on 1 platform by ruby-devise 4.5.0-3 (version 4.5.0-3), released April 3, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-5421
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0156
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 3, 2019

## Description

Plataformatec Devise version 4.5.0 and earlier, using the lockable module contains a CWE-367 vulnerability in The `Devise::Models::Lockable` class, more specifically at the `#increment_failed_attempts` method. File location: lib/devise/models/lockable.rb that can result in Multiple concurrent requests can prevent an attacker from being blocked on brute force attacks. This attack appear to be exploitable via Network connectivity - brute force attacks. This vulnerability appears to have been fixed in 4.6.0 and later.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ruby-devise Ubuntu 20.04 LTS (focal) | 4.5.0-3 | [ruby-devise 4.5.0-3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ruby-devise-4.5.0-3.md) | Apr 3, 2019 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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