CVE-2025-14440
JAY Login & Register <= 2.4.01 - Authentication Bypass via Cookie
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
The 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.
| CWE | CWE-565 |
| Vendor | jayarsiech |
| Product | jay login & register |
| Published | Dec 13, 2025 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
jayarsiech / JAY Login & Register
0 ≤ 2.4.01
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/928877a6-eeeb-4ed5-900b-9b1560e1bf87?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/jay-login-register/tags/2.4.01/includes/jay-login-register-user-switching.php#L98 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3418754/
Credits
Kenneth Dunn