CVE-2026-14936

Simple Membership < 4.7.7 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver Verification

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.

Affected

Simple Membership

CVSS v3.1 WPSCAN

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.16% chance of exploitation in the next 30 days, 5th percentile

Published

2026-08-06

Updated

2026-08-07

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/82ac8cd9-db44-49c7-905c-16d261c5c516/

References

• CVE Record
• NVD entry