CVE-2025-14440

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

2025-12-12 16:06

Strategic Overview

Status: Patched in 2.5.01
Affected Plugin: JAY Login & Register
Affected Version: <= 2.4.01
CVSS: 9.8Critical
Weakness type: CWE-565 · Reliance on Cookies without Validation and Integrity Checking
CVE: CVE-2025-14440

View all JAY Login & Register vulnerabilities

At a glance

CVE-2025-14440 is a critical-severity Reliance on Cookies without Validation and Integrity Checking vulnerability in the JAY Login & Register WordPress plugin, affecting versions <= 2.4.01. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 2.5.01; sites on affected versions should update now. Disclosed December 2025, reported by kr0d.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

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

The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user.

Remediation

Update to version 2.5.01, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: JAY Login & Register 2.5.01 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-14440 https://www.wordfence.com/threat-intel/vulnerabilities/id/928877a6-eeeb-4ed5-900b-9b1560e1bf87 https://nvd.nist.gov/vuln/detail/CVE-2025-14440

Related records

Other vulnerabilities in JAY Login & Register

CVSS Vector

9.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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