CVE-2026-1461
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
19/02/2026
Last modified:
19/02/2026
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.
Impact
Base Score 3.x
6.50
Severity 3.x
MEDIUM
References to Advisories, Solutions, and Tools
- https://plugins.trac.wordpress.org/browser/simple-membership/trunk/classes/class.swpm-wp-loaded-tasks.php#L90
- https://plugins.trac.wordpress.org/browser/simple-membership/trunk/ipn/swpm-stripe-webhook-handler.php#L26
- https://plugins.trac.wordpress.org/changeset/3453404/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/4e4df9a6-8f7d-428b-a596-0751ca047169?source=cve