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CVE-2026-9242

MEDIUM 5.3 CVSS 3.1
Published
June 27, 2026
Last modified
June 29, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-345
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Description

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.

Affected WordPress components

  • RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login Plugin · custom-registration-form-builder-with-submission-manager
    Confirmed match Active
    Up to and including 6.0.8.6
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • metagauss RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login — Up to and including 6.0.8.6

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/includes/class_rm_utilities.php#L1384
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/public/class_rm_public.php#L728
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/services/class_rm_paypal_service.php#L110
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/services/class_rm_paypal_service.php#L155
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/includes/class_rm_utilities.php#L1384
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/public/class_rm_public.php#L728
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/services/class_rm_paypal_service.php#L110
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/services/class_rm_paypal_service.php#L155
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/includes/class_rm_utilities.php#L1384
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/public/class_rm_public.php#L728
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_paypal_service.php#L110
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_paypal_service.php#L155
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3532900%40custom-registration-form-builder-with-submission-manager&new=3532900%40custom-registration-form-builder-with-submission-manager&sfp_email=&sfph_mail=
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/1dcf68fd-e9d3-4a46-8bd4-15c2598b91fe?source=cve
  • nvd.nist.gov Official NVD record