Vulnerability Brief
CVE-2026-9242
What this means for your business
A security vulnerability in the WordPress plugin RegistrationMagic could allow unauthorized users to access and control any WordPress account, including administrator accounts, by exploiting a flaw in how the plugin handles PayPal transactions. This means that attackers could potentially gain access to sensitive information, make changes to the website, or even take control of the entire site. To protect your business, it's essential to update the plugin to a secure version or consider replacing it with an alternative solution.
- Severity: MEDIUM
- CVSS score: 5.3
Technical summary
The RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login plugin for WordPress is vulnerable to Authentication Bypass via Insufficient Verification of Data Authenticity in all versions up to and including 6.0.8.6. This is due to the PayPal IPN `callback` handler being registered as a nopriv AJAX action with no authentication or nonce requirement, and critically because the handler updates the payment log database row with attacker-controlled POST data — including `payment_status` and the `custom` field encoding the target `user_id` — before PayPal IPN validation is performed, meaning the database remains poisoned even when validation subsequently fails. This makes it possible for unauthenticated attackers to authenticate as any WordPress user, including administrators, by submitting a forged IPN request that overwrites a payment log entry's `user_id` with that of a target account, then visiting the success return URL with a legitimately obtained security hash to cause the plugin to issue real WordPress authentication cookies for the targeted account.