CVE-2026-9242

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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 \u2014 including `payment_status` and the `custom` field encoding the target `user_id` \u2014 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."}], "title": "RegistrationMagic <= 6.0.8.6 - Authenticated (Subscriber+) Authentication Bypass via Forged PayPal IPN Request", "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/1dcf68fd-e9d3-4a46-8bd4-15c2598b91fe?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_paypal_service.php#L155"}, {"url": "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"}, {"url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/public/class_rm_public.php#L728"}, {"url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/public/class_rm_public.php#L728"}, {"url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_paypal_service.php#L110"}, {"url": "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"}, {"url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/includes/class_rm_utilities.php#L1384"}, {"url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/includes/class_rm_utilities.php#L1384"}, {"url": "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"}, {"url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/public/class_rm_public.php#L728"}, {"url": "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"}, {"url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/includes/class_rm_utilities.php#L1384"}, {"url": "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="}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-345 Insufficient Verification of Data Authenticity", "cweId": "CWE-345", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}], "credits": [{"lang": "en", "type": "finder", "value": "Rafael Gunawan (kokon)"}], "timeline": [{"time": "2026-05-21T19:17:52.000Z", "lang": "en", "value": "Vendor Notified"}, {"time": "2026-06-26T18:09:49.000Z", "lang": "en", "value": "Disclosed"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-29T12:22:27.759989Z", "id": "CVE-2026-9242", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-29T12:23:09.250Z"}}]}}

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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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-345", "description": "CWE-345 Insufficient Verification of Data Authenticity"}]}], "providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-06-27T06:50:56.027Z"}}}, "cveMetadata": {"cveId": "CVE-2026-9242", "state": "PUBLISHED", "dateUpdated": "2026-06-29T12:23:09.250Z", "dateReserved": "2026-05-21T19:02:37.567Z", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "datePublished": "2026-06-27T06:50:56.027Z", "assignerShortName": "Wordfence"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "RegistrationMagic \u2013 Custom Registration Forms, User Registration, Payment, and User Login", "vendor": "metagauss", "versions": [{"lessThanOrEqual": "6.0.8.6", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The RegistrationMagic \u2013 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 \u2014 including `payment_status` and the `custom` field encoding the target `user_id` \u2014 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."}], "id": "CVE-2026-9242", "lastModified": "2026-06-29T18:40:23.203", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-9242", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-29T12:22:27.759989Z", "version": "2.0.3"}}]}, "published": "2026-06-27T08:16:45.893", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/includes/class_rm_utilities.php#L1384"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.1/public/class_rm_public.php#L728"}, {"source": "security@wordfence.com", "url": "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"}, {"source": "security@wordfence.com", "url": "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"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/includes/class_rm_utilities.php#L1384"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/tags/6.0.8.4/public/class_rm_public.php#L728"}, {"source": "security@wordfence.com", "url": "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"}, {"source": "security@wordfence.com", "url": "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"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/includes/class_rm_utilities.php#L1384"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/public/class_rm_public.php#L728"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_paypal_service.php#L110"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_paypal_service.php#L155"}, {"source": "security@wordfence.com", "url": "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="}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/1dcf68fd-e9d3-4a46-8bd4-15c2598b91fe?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

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