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CVE-2015-8314 — Vulnerability in devise — CVE Details

HIGH

Devise Gem for Ruby Unauthorized Access Using "Remember Me" Cookie

Published January 26, 2023Updated February 4, 2026Source: osv

Summary

Devise version before 3.5.4 uses cookies to implement a "Remember me" functionality. However, it generates the same cookie for all devices. If an attacker manages to steal a remember me cookie and the user does not change the password frequently, the cookie can be used to gain access to the application indefinitely.

Advisory Timeline

  • First published January 26, 2023 (1354 days ago).
  • Last revised February 4, 2026 — 1104 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update devise to 3.5.4 or later
gem install devise -v 3.5.4

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
devise
rubygems
0.1.0, 0.1.1, 0.2.0, 0.2.1 (+126 more)3.5.4

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Frequently Asked Questions

What is CVE-2015-8314?
Devise Gem for Ruby Unauthorized Access Using "Remember Me" Cookie This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2015-8314?
CVE-2015-8314 affects devise. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2015-8314 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-746g-3gfp-hfhw

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  • CVE-2026-77601
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  • CVE-2026-32700
    MEDIUM

    Devise has a confirmable "change email" race condition permits user to confirm email they have no access to

  • CVE-2026-40295
    MEDIUM

    Devise has an Open Redirect via Unvalidated `request.referrer` in Timeoutable Session Timeout Handler

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