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.
CVE-2026-1461 is a medium severity with CVSS 6.5 Vulnerability issue affecting the Plugin Simple Membership. It affects Versions up to 4.7.0 and is fixed in 4.7.1.
CVE-2026-1461 is tracked for the Plugin Simple Membership as medium severity with CVSS 6.5. The affected range is Versions up to 4.7.0. Update Simple Membership to 4.7.1 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
simple-membership
View on wordpress.org
|
| CVE | CVE-2026-1461 |
| Patched Versions |
4.7.1
|
| Affected Versions |
Versions up to 4.7.0
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Simple Membership <= 4.1.2 - Membership Privilege Escalation
Simple Membership <= 4.3.4 - Account Takeover via Password Reset
Simple Membership <= 4.1.2 - Membership Privilege Escalation
Simple Membership <= 4.0.8 - Cross-Site Request Forgery to Arbitrary Member Deletion
Simple Membership <= 3.8.4 - Cross-Site Request Forgery
Simple Membership <= 3.3.2 - Multiple Cross-Site Request Forgery
Simple Membership <= 4.3.4 - Privilege escalation via Registration
Simple Membership <= 4.3.5 - Reflected Cross-Site Scripting
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