CVE-2026-11964

Description

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.

PUBLISHED Reserved 2026-06-11 | Published 2026-07-13 | Updated 2026-07-13 | Assigner WPScan

Problem types

CWE-287 Improper Authentication

Product status

Credits

Alessandro Greco aka Aleff finder

Giovanbattista Ianni (University of Calabria - UNICAL) finder

WPScan coordinator

References

wpscan.com/...rability/faf55649-8f76-4abf-a6b9-0d0774e22d29/ exploit vdb-entry technical-description

cve.org (CVE-2026-11964)

nvd.nist.gov (CVE-2026-11964)

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