CVE-2026-88764
The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged membership level.
- Published Sep 13, 2026
- CVSS 5.4 medium
- 0.2% chance of exploitation in the next 30 days (EPSS)
- A fix is available