CVE-2026-12093 Missing authorization in Simple Membership
Unauthenticated attackers can deactivate arbitrary member accounts by forging Stripe webhooks on installations lacking a configured signing secret.
- 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-2026-12093?
CVE-2026-12093 is a medium-severity missing authorization vulnerability in wpinsider-1 Simple Membership, published on 18 Jun 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 authorization bypass in all versions up to, and including, 4.7.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to deactivate arbitrary member accounts by forging a charge.refunded webhook event containing a victim's subscription ID, setting the target member's account_state to 'inactive' and triggering cancellation hooks, transaction-record status changes, and cancellation notification emails. This vulnerability is exploitable only on installations where no Stripe webhook signing secret has been configured, which is the default out-of-the-box state; sites that have configured the stripe-webhook-signing-secret option are routed to the properly verified HMAC path and are not affected.
Weakness: CWE-862
Which versions are affected by CVE-2026-12093?
How do I fix CVE-2026-12093?
No fix has been published for CVE-2026-12093 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-12093 being exploited?
There is no known exploitation of CVE-2026-12093 in the wild and no public exploit code.
Sources
Also known as GHSA-6q57-f535-3g3g.