CVE-2026-11964

critical · 9.1

The User Registration & Membership WordPress plugin before 5.2.2 does not verify the authenticity of incoming payment-provider webhook notifications before acting on them, allowing unauthenticated attackers to forge a payment-approved event and activate a paid membership subscription without completing a real payment.

9.1

CVSS

0.5%

EPSS (exploit prob.)

39th

EPSS percentile

2026-07-13

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

https://wpscan.com/vulnerability/faf55649-8f76-4abf-a6b9-0d0774e22d29/

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-11964