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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| User Registration Plugin | — | Update user-registration plugin to version 5.2.2, or a newer patched version | Jul 31, 2026 | Jun 22, 2026 |
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