CVE-2026-14936 Simple Membership < 4.7.7 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver Verification
Unauthenticated attackers can bypass payment verification to activate or extend memberships by sending fake PayPal notifications, affecting Simple Membership plugin users.
- 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-2026-14936?
CVE-2026-14936 is a medium-severity vulnerability in Unknown Simple Membership, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Simple Membership WordPress plugin before 4.7.7 does not verify that a PayPal payment notification was sent to the site's own configured merchant account before activating a membership, allowing unauthenticated users to activate or extend a membership using a payment made to an arbitrary PayPal account they control.
Weakness: CWE-345
Which versions are affected by CVE-2026-14936?
How do I fix CVE-2026-14936?
No fix has been published for CVE-2026-14936 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-14936 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-14936 exists.
Sources
Also known as GHSA-rx87-886c-g6fw.