CVE-2026-18468

Login & Register Forms <= 4.0.1 - Unauthenticated Privilege Escalation via Account Takeover

2026-08-05 00:00
Artus KG

Strategic Overview

Status
Patched in 4.0.2
Affected Plugin
Login & Register Customizer – Forms, Popup, Profile & WooCommerce
Affected Version
<= 4.0.1
CVSS
9.8Critical
Weakness type
CWE-620 · Unverified Password Change
CVE
CVE-2026-18468
View all Login & Register Customizer – Forms, Popup, Profile & WooCommerce vulnerabilities

At a glance

CVE-2026-18468 is a critical-severity Unverified Password Change vulnerability in the Login & Register Customizer WordPress plugin, affecting versions <= 4.0.1. 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 4.0.2; sites on affected versions should update now. Disclosed August 2026, reported by Artus KG.

Vulnerability Overview

The Login & Register Customizer – Forms, Popup, Profile & WooCommerce plugin for WordPress is vulnerable to privilege escalation via account takeover in all versions up to, and including, 4.0.1. This is due to the plugin not properly validating a user's identity prior to updating their password. This makes it possible for unauthenticated attackers to change arbitrary user's passwords, including administrators, and leverage that to gain access to their account.

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-620: Unverified Password Change

Reaching this weakness in Login & Register Customizer <= 4.0.1 takes no account at all. Unverified password change means the password-update path does not require proof that the requester is the account owner.

An attacker who can reach the endpoint takes over the account outright, and the legitimate owner is locked out of it. For Login & Register Customizer the fix is 4.0.2: builds <= 4.0.1 are affected, anything from 4.0.2 onward is not.

Remediation

Update to version 4.0.2, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Login & Register Customizer 4.0.2 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-18468https://www.wordfence.com/threat-intel/vulnerabilities/id/e93c8b3a-d8d8-4d2b-9df0-ea27e33947e0https://nvd.nist.gov/vuln/detail/CVE-2026-18468

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C