CVE-2026-9242
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
The RegistrationMagic plugin for WordPress up to version 6.0.8.6 contains an authentication bypass vulnerability due to insufficient data authenticity verification in the PayPal IPN handler. The handler is accessible to unauthenticated users and updates the database before IPN validation, allowing an attacker to forge an IPN request, overwrite the user ID in a payment log, and then obtain authentication cookies for any user, including administrators.
Risk Assessment
The risk is critical – an unauthenticated attacker can take over an administrator account, leading to full site compromise, including data theft, malware installation, and defacement.
Recommendation
Immediately update the RegistrationMagic plugin to the latest available version. If an update is not possible, temporarily disable the plugin or restrict access to the PayPal IPN endpoint to trusted IP addresses.
Other vulnerabilities in RegistrationMagic
See all- CVE-2026-73341Critical
An unauthenticated attacker can perform PHP Object Injection in RegistrationMagic versions up to 6.0.9.7.
- CVE-2026-49764Critical
Versions of RegistrationMagic up to 6.0.8.6 have a vulnerability in unauthenticated authentication, which may allow attackers to take over user accounts.
- CVE-2026-77790Low risk· EPSS 9%
The RegistrationMagic WordPress plugin before version 6.0.9.4 does not sanitize and escape a parameter before using it in a SQL statement, which could allow high privilege users such as admin to perform SQL injection attacks.
- CVE-2026-15208Medium
The RegistrationMagic WordPress plugin before 6.0.9.5 does not compare the verified PayPal capture's amount, currency, payee, or prior use against the registration it is finalising: its server-side check only confirms the capture status is COMPLETED. An unauthenticated attacker can therefore finalise an expensive paid registration with any genuinely-completed low-value capture, and replay a single capture across unlimited registrations because captures are not de-duplicated.
- CVE-2026-15257Medium
The RegistrationMagic WordPress plugin before 6.0.9.4 lacks authorization, ownership, and nonce checks on a front-end submission-editing action, allowing unauthenticated attackers to overwrite other users' submissions and profile fields of non-admin accounts.
- CVE-2026-15255Medium
The RegistrationMagic WordPress plugin before 6.0.9.4 does not properly validate that a one-time password cookie belongs to the requested identity, allowing unauthenticated attackers to read other users' form submissions, including personal information.
Original NVD description (English source)
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.