CVE-2026-1461: CWE-230 Improper Handling of Missing Values in wpinsider-1 Simple Membership
The Simple Membership plugin for WordPress is vulnerable to Improper Handling of Missing Values in all versions up to, and including, 4.7.0 via the Stripe webhook handler. This is due to the plugin only validating webhook signatures when the stripe-webhook-signing-secret setting is configured, which is empty by default. This makes it possible for unauthenticated attackers to forge Stripe webhook events to manipulate membership subscriptions, including reactivating expired memberships without payment or canceling legitimate subscriptions, potentially leading to unauthorized access and service disruption.
AI Analysis
Technical Summary
CVE-2026-1461 describes an improper handling of missing values (CWE-230) in the Simple Membership WordPress plugin's Stripe webhook handler. The plugin fails to validate webhook signatures unless the stripe-webhook-signing-secret configuration is set, which defaults to empty. This flaw enables unauthenticated attackers to send forged Stripe webhook events, leading to unauthorized manipulation of membership subscription states such as reactivation or cancellation without proper authorization or payment.
Potential Impact
Successful exploitation can lead to unauthorized access by reactivating expired memberships without payment or disruption of service by canceling legitimate subscriptions. This compromises the integrity of membership management and may result in financial loss or service abuse. The CVSS score of 6.5 reflects a medium impact on confidentiality and integrity, with no direct impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, administrators should ensure the stripe-webhook-signing-secret setting is properly configured with a valid secret to enforce webhook signature validation. This configuration prevents unauthenticated webhook events from being accepted. Monitor vendor channels for updates and apply patches promptly once released.
CVE-2026-1461: CWE-230 Improper Handling of Missing Values in wpinsider-1 Simple Membership
Description
The Simple Membership plugin for WordPress is vulnerable to Improper Handling of Missing Values in all versions up to, and including, 4.7.0 via the Stripe webhook handler. This is due to the plugin only validating webhook signatures when the stripe-webhook-signing-secret setting is configured, which is empty by default. This makes it possible for unauthenticated attackers to forge Stripe webhook events to manipulate membership subscriptions, including reactivating expired memberships without payment or canceling legitimate subscriptions, potentially leading to unauthorized access and service disruption.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-1461 describes an improper handling of missing values (CWE-230) in the Simple Membership WordPress plugin's Stripe webhook handler. The plugin fails to validate webhook signatures unless the stripe-webhook-signing-secret configuration is set, which defaults to empty. This flaw enables unauthenticated attackers to send forged Stripe webhook events, leading to unauthorized manipulation of membership subscription states such as reactivation or cancellation without proper authorization or payment.
Potential Impact
Successful exploitation can lead to unauthorized access by reactivating expired memberships without payment or disruption of service by canceling legitimate subscriptions. This compromises the integrity of membership management and may result in financial loss or service abuse. The CVSS score of 6.5 reflects a medium impact on confidentiality and integrity, with no direct impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, administrators should ensure the stripe-webhook-signing-secret setting is properly configured with a valid secret to enforce webhook signature validation. This configuration prevents unauthenticated webhook events from being accepted. Monitor vendor channels for updates and apply patches promptly once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-01-27T02:01:14.522Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6996de3e6aea4a407a4fb0ec
Added to database: 2/19/2026, 9:56:14 AM
Last enriched: 4/9/2026, 6:29:58 PM
Last updated: 5/23/2026, 6:50:18 PM
Views: 180
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