CVE-2025-14440

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

criticalReliance on Cookies without Validation and Integrity Checking

9.8

CVSS Score

9.8

CVSS Score

critical

Severity

2.5.01

Patched in

Time to patch

Description

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.

CVSS Vector Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

High

Confidentiality

High

Integrity

High

Availability

Technical Details

Affected versions<=2.4.01

PublishedDecember 12, 2025

Last updatedDecember 19, 2025

Affected pluginjay-login-register

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/928877a6-eeeb-4ed5-900b-9b1560e1bf87?source=api-prod

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