CVE-2026-1461 Simple Membership <= 4.7.0 - Unauthenticated Improper Handling of Missing Values
Unauthenticated attackers can forge Stripe webhooks to manipulate membership subscriptions, bypassing payment validation and altering user access states.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1461?
CVE-2026-1461 is a medium-severity vulnerability in wpinsider-1 Simple Membership, published on 19 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-230
Which versions are affected by CVE-2026-1461?
How do I fix CVE-2026-1461?
No fix has been published for CVE-2026-1461 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1461 being exploited?
There is no known exploitation of CVE-2026-1461 in the wild and no public exploit code.
Sources
Also known as GHSA-h972-rpm4-hj8q.