JAY Login & Register <= 2.4.01 - Authentication Bypass via Cookie

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Summary

CVECVE-2025-14440
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-13 16:16:49 UTC
Updated2026-04-08 18:24:11 UTC
DescriptionThe JAY Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.4.01. This is due to incorrect authentication checking in the 'jay_login_register_process_switch_back' function with the 'jay_login_register_process_switch_back' cookie value. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the user id.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.001290000 probability, percentile 0.322980000 (date 2026-04-08)

Problem Types: CWE-565 | CWE-565 CWE-565 Reliance on Cookies without Validation and Integrity Checking

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Jayarsiech JAY Login Register affected 2.4.01 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/928877a6-eeeb-4ed5-900b-9b156... [email protected] www.wordfence.com
plugins.trac.wordpress.org/changeset/3418754 [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/jay-login-register/tags/2.4.01/includes/jay-login-reg... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Kenneth Dunn (en)

Additional Advisory Data

SourceTimeEvent
CNA2025-12-12T16:06:15.000ZDisclosed
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