{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103646", "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "state": "PUBLISHED", "assignerShortName": "WPScan", "dateReserved": "2026-10-01T06:42:15.491Z", "datePublished": "2026-10-08T06:00:05.353Z", "dateUpdated": "2026-10-08T10:59:19.784Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "shortName": "WPScan", "dateUpdated": "2026-10-08T06:00:05.353Z"}, "title": "Ultimate Multisite < 2.17.0 - Unauthenticated Authentication Bypass via 'email_address' Parameter", "problemTypes": [{"descriptions": [{"description": "CWE-287 Improper Authentication", "lang": "en", "type": "CWE"}]}], "affected": [{"vendor": "Unknown", "product": "Ultimate Multisite", "versions": [{"status": "affected", "versionType": "semver", "version": "0", "lessThan": "2.17.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The Ultimate Multisite WordPress plugin before 2.17.0 does not require authentication before a logged-out checkout is linked to, and logged in as, an existing WordPress account matching the submitted email address, and its duplicate-account check normalizes that address differently from the lookup used to create the customer, so an unauthenticated attacker can log in as any existing user, including a Network Super Admin, whose email address they know.\nThis bypass is not addressed by the 2.15.1 fix for CVE-2026-75957 and remains exploitable in all versions up to and including 2.16.1, the releases that fix was expected to cover. Exploitation requires a checkout form configured without a password field (auto-generated password) and a target account that has no existing customer record in the Ultimate Multisite WordPress plugin before 2.17.0."}], "references": [{"url": "https://wpscan.com/vulnerability/a05da0ad-5d92-406f-b182-b3ed1f8389f3/", "tags": ["exploit", "vdb-entry", "technical-description"]}], "credits": [{"lang": "en", "value": "Erwan LR (WPScan)", "type": "finder"}, {"lang": "en", "value": "WPScan", "type": "coordinator"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "WPScan CVE Generator"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-103646", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-08T10:58:10.240709Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-287", "description": "CWE-287 Improper Authentication"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-08T10:59:19.784Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103646", "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "state": "PUBLISHED", "assignerShortName": "WPScan", "dateReserved": "2026-10-01T06:42:15.491Z", "datePublished": "2026-10-08T06:00:05.353Z", "dateUpdated": "2026-10-08T10:59:19.784Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "shortName": "WPScan", "dateUpdated": "2026-10-08T06:00:05.353Z"}, "title": "Ultimate Multisite < 2.17.0 - Unauthenticated Authentication Bypass via 'email_address' Parameter", "problemTypes": [{"descriptions": [{"description": "CWE-287 Improper Authentication", "lang": "en", "type": "CWE"}]}], "affected": [{"vendor": "Unknown", "product": "Ultimate Multisite", "versions": [{"status": "affected", "versionType": "semver", "version": "0", "lessThan": "2.17.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The Ultimate Multisite WordPress plugin before 2.17.0 does not require authentication before a logged-out checkout is linked to, and logged in as, an existing WordPress account matching the submitted email address, and its duplicate-account check normalizes that address differently from the lookup used to create the customer, so an unauthenticated attacker can log in as any existing user, including a Network Super Admin, whose email address they know.\nThis bypass is not addressed by the 2.15.1 fix for CVE-2026-75957 and remains exploitable in all versions up to and including 2.16.1, the releases that fix was expected to cover. Exploitation requires a checkout form configured without a password field (auto-generated password) and a target account that has no existing customer record in the Ultimate Multisite WordPress plugin before 2.17.0."}], "references": [{"url": "https://wpscan.com/vulnerability/a05da0ad-5d92-406f-b182-b3ed1f8389f3/", "tags": ["exploit", "vdb-entry", "technical-description"]}], "credits": [{"lang": "en", "value": "Erwan LR (WPScan)", "type": "finder"}, {"lang": "en", "value": "WPScan", "type": "coordinator"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "WPScan CVE Generator"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-103646", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-08T10:58:10.240709Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-287", "description": "CWE-287 Improper Authentication"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-08T10:57:01.628Z"}}]}}

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{}

{"created": "2026-10-08T07:45:17.533778+00:00", "updated": "2026-10-08T13:00:07.554803+00:00", "vendors": []}