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Vulnerability record · CVE-2026-11964 · published 13 July 2026

CVE-2026-11964: The User Registration & Membership WordPress plugin before 5.2.2 does not verify the authenticity of incoming…

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 3.1 Critical EPSS 0.45% · top 63.1% Deferred
9.1CVSS 3.1 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
13 Jul 2026Last modified by NVD

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.

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

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-11964), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.