Reported vulnerability

Membership Plugin – Kadence Memberships <= 4.0.0 - Unauthenticated Password Reset Link Poisoning to Account Takeover

Published 4 Aug 2026

Updated 5 Aug 2026

CVE-2026-9273

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

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Wordfence advisory

critical · CVSS 9.3

The Membership Plugin – Kadence Memberships plugin for WordPress (formerly Restrict Content) is vulnerable to password reset link poisoning leading to account takeover in all versions up to, and including, 4.0.0. This is due to the legacy lost-password handler rc_process_lost_password_form() consuming the attacker-controlled rc_redirect POST parameter into two unvalidated sinks in legacy/includes/forms.php: wp_redirect( esc_url( $_POST['rc_redirect'] ) . ... ) at line 243, and add_query_arg( array( 'key' => $key, 'login' => ... ), $_POST['rc_redirect'] ) inside rc_send_password_reset_email() at line 306. The nonce required to reach the handler is broadcast by the public [login_form] shortcode at line 207 to any anonymous visitor. This makes it possible for unauthenticated attackers to issue a password-reset request for any account (including administrators) whose reset email body points the victim at an attacker-controlled host carrying a valid reset key/login. When the victim clicks the link, the reset key leaks to the attacker, who can replay it against the legitimate site to complete account takeover.

Severity vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Membership Plugin – Kadence Memberships

Software: plugin · restrict-content
Affected versions: Start version unspecified, through 4.0.0
Fix availability: Fix available
Fixed versions: 4.0.1

Recommended action

Update to version 4.0.1, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/ca38c423-2df8-4f20-bd95-2ecd84167a7f?source=api-prod

Data sources and licences

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Source: Wordfence

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Questions about this vulnerability

Which versions of Membership Plugin – Kadence Memberships are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.0.0. Use the version checker above to compare your installed release with this report.

Is a fix available for Membership Plugin – Kadence Memberships?

Wordfence reports a fix for this issue in Membership Plugin – Kadence Memberships. It lists these fixed versions: 4.0.1. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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