Membership Plugin – Kadence Memberships <= 4.0.0 - Unauthenticated Password Reset Link Poisoning to Account Takeover
Summary
| CVE | CVE-2026-9273 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-05 06:16:40 UTC |
| Updated | 2026-08-12 21:00:37 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 9.3 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
EPSS: 0.002760000 probability, percentile 0.199170000 (date 2026-08-13)
Problem Types: CWE-640 | CWE-640 CWE-640 Weak Password Recovery Mechanism for Forgotten Password
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 9.3 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
| 3.1 | CNA | DECLARED | 9.3 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
ChangedConfidentiality
HighIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Stellarwp | Membership Plugin Kadence Memberships | affected 4.0.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/ca38c423-2df8-4f20-bd95-2ecd8... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/restrict-content/tags/4.0.0/legacy/includes/forms.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/restrict-content/trunk/legacy/includes/forms.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/restrict-content/trunk/legacy/includes/forms.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/restrict-content/tags/4.0.0/legacy/includes/forms.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/restrict-content/tags/4.0.0/legacy/includes/forms.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: scort (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-05-22T11:26:30.000Z | Vendor Notified |
| CNA | 2026-08-04T16:16:32.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.