CVE-2026-9242 json
RegistrationMagic <= 6.0.8.6 - Authenticated (Subscriber+) Authentication Bypass via Forged PayPal IPN Request
published 2026-06-27 4 mo ago modified 2026-06-29 4 mo ago also EUVD-2026-39949
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- metagauss RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login
Classification
- Weakness
-
- CWE-345 Insufficient Verification of Data Authenticity
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/1dcf68fd-e9d3-4a46-8bd4-15c2598b91fe?source=cve
- plugins.trac.wordpress.org /browser/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_paypal_service.php#L
- plugins.trac.wordpress.org /browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/services/class_rm_paypal_servic
- plugins.trac.wordpress.org /browser/custom-registration-form-builder-with-submission-manager/trunk/public/class_rm_public.php#L728
- 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 /browser/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_paypal_service.php#L
- plugins.trac.wordpress.org /browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/services/class_rm_paypal_servic
- plugins.trac.wordpress.org /browser/custom-registration-form-builder-with-submission-manager/trunk/includes/class_rm_utilities.php#L1384
- plugins.trac.wordpress.org /browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/includes/class_rm_utilities.php
- plugins.trac.wordpress.org /browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/services/class_rm_paypal_servic
- 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 /browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/services/class_rm_paypal_servic
- plugins.trac.wordpress.org /browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/includes/class_rm_utilities.php
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3532900%40custom-registration-form-builder-with-submission-mana
Sources
- CVE List CVE-2026-9242
- NVD CVE-2026-9242
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.