πŸ” CVE Alert

CVE-2026-1461

MEDIUM 6.5

Simple Membership <= 4.7.0 - Unauthenticated Improper Handling of Missing Values

CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th

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.

CWE CWE-230
Vendor wpinsider-1
Product simple membership
Published Feb 19, 2026
Last Updated Apr 8, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability

Affected Versions

wpinsider-1 / Simple Membership
0 ≀ 4.7.0

References

NVD β†— CVE.org β†— EPSS Data β†—
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/4e4df9a6-8f7d-428b-a596-0751ca047169?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/simple-membership/trunk/ipn/swpm-stripe-webhook-handler.php#L26 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/simple-membership/trunk/classes/class.swpm-wp-loaded-tasks.php#L90 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3453404/

Credits

RafaΕ‚