CVE-2026-1461CWE-230

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

Medium · published February 19, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
17.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00263 · 17.2th percentile
Weakness
CWE-230 · Improper Handling of Missing Values
Published
2026-02-19T09:26Z
EPSS history
Timeline
  • 19 FEB 09:26Z
    Simple Membership <= 4.7.0 - Unauthenticated Improper Handling of Missing Values
    cvelistv5