CVE-2026-11964

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.

CVSS v3.1

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

EPSS

0.45% chance of exploitation in the next 30 days, 38th percentile

Published

2026-07-13

Proof-of-concept exploits (1)

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

References

• CVE Record
• NVD entry

Related

• CVE-2026-11963
• CVE-2026-11965
• CVE-2026-11962
• CVE-2026-11966
• CVE-2026-11961
• CVE-2026-1197