CVE-2026-18470: Login & Register Forms plugin email address disclosure in password reset

CVE-2026-18470 · Severity: high · CVSS 7.5 · Published 2026-08-10

The Login & Register Forms WordPress plugin allows unauthenticated attackers to discover registered users' email addresses through a flaw in its password reset functionality. When configured with the verification-code reset mode (a non-default setting), the plugin returns inadequately masked email addresses in response to password reset requests, and does not verify that requests come from the account owner. This enables attackers to enumerate and extract contact information for all users, including site administrators, without authentication or authorization.

Quick answers

Is CVE-2026-18470 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-18470 being exploited in the wild.
How severe is CVE-2026-18470?
High severity, with a CVSS score of 7.5, published 10 August 2026.
Which products and versions are affected?
Easy Login and Register Forms Login & Register Forms 3.0.0 to 4.0.1.
Is there a fix for CVE-2026-18470?
A patch was published on 2026-04: Fixed in version 4.0.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-18470 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-18470?
Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an information disclosure flaw (CWE-200) in the password reset feature of the Login & Register Forms plugin (versions 3.0.0–4.0.1). When configured to use verification-code reset mode, the plugin's AJAX endpoint (xoo_el_form_action) accepts unauthenticated requests with a username parameter and returns the associated account's email address. The email masking is insufficient: the redacted format reveals the structure and can be reverse-engineered through repeated requests to confirm candidate addresses. Additionally, when an account's username is email-shaped, the stored address is returned completely unmasked. The vulnerability requires network access to the WordPress site and is reachable via POST to wp-admin/admin-ajax.php. The default reset mode ("Send Reset Link") is not affected. The issue was patched in version 4.0.2.

Affected products

  • Easy Login and Register Forms Login & Register Forms 3.0.0 to 4.0.1

Timeline

  • 2026-08-05: disclosed
  • 2026-04: patched: Fixed in version 4.0.2
  • 2026-08-10: advisory

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.