What’s Vulnerable › Vulnerabilities

CVE-2019-5421

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-04-03 · updated 2026-06-17
• Weakness: CWE-367

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.

Affected products

• Plataformatec Devise ruby gem: through 4.5.0

References

• https://github.com/plataformatec/devise/issues/4981
• https://github.com/plataformatec/devise/pull/4996
• https://github.com/plataformatec/devise/issues/4981
• https://github.com/plataformatec/devise/pull/4996

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