StellarWP Kadence Memberships Plugin up to 4.0.0 on WordPress Password Reset forms.php rc_process_lost_password_form rc_redirect

Summaryinfo

A vulnerability, which was classified as problematic, was found in StellarWP Kadence Memberships Plugin up to 4.0.0. Affected by this issue is the function rc_process_lost_password_form of the file legacy/includes/forms.php of the component Password Reset Handler. Such manipulation of the argument rc_redirect leads to redirect. This vulnerability is traded as CVE-2026-9273. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in StellarWP Kadence Memberships Plugin up to 4.0.0 and classified as problematic. Affected by this issue is the function rc_process_lost_password_form of the file legacy/includes/forms.php of the component Password Reset Handler. The manipulation of the argument rc_redirect with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is integrity. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-9273 since 05/22/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/05/2026). The MITRE ATT&CK project declares the attack technique as T1204.001.

By approaching the search of inurl:legacy/includes/forms.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• StellarWP

Name

• Kadence Memberships Plugin

Version

• 4.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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