CVE-2026-4248

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Ultimate Member \u2013 User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin", "vendor": "ultimatemember", "versions": [{"lessThanOrEqual": "2.11.2", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Ultimate Member plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.11.2. This is due to the '{usermeta:password_reset_link}' template tag being processed within post content via the '[um_loggedin]' shortcode, which generates a valid password reset token for the currently logged-in user viewing the page. This makes it possible for authenticated attackers, with Contributor-level access and above, to craft a malicious pending post that, when previewed by an Administrator, generates a password reset token for the Administrator and exfiltrates it to an attacker-controlled server, leading to full account takeover."}, {"lang": "es", "value": "El plugin Ultimate Member para WordPress es vulnerable a la exposici\u00f3n de informaci\u00f3n sensible en todas las versiones hasta e incluyendo la 2.11.2. Esto se debe a que la etiqueta de plantilla '{usermeta:password_reset_link}' se procesa dentro del contenido de una publicaci\u00f3n a trav\u00e9s del shortcode '[um_loggedin]', lo que genera un token de restablecimiento de contrase\u00f1a v\u00e1lido para el usuario actualmente conectado que ve la p\u00e1gina. Esto hace posible que atacantes autenticados, con acceso de nivel Colaborador o superior, creen una publicaci\u00f3n maliciosa pendiente que, cuando es previsualizada por un Administrador, genera un token de restablecimiento de contrase\u00f1a para el Administrador y lo exfiltra a un servidor controlado por el atacante, lo que lleva a una toma de control total de la cuenta."}], "id": "CVE-2026-4248", "lastModified": "2026-06-17T10:56:18.103", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 5.9, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-4248", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-01T13:46:29.470662Z", "version": "2.0.3"}}]}, "published": "2026-03-27T23:17:14.753", "references": [{"source": "security@wordfence.com", "url": "https://github.com/ultimatemember/ultimatemember/pull/1799"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.2/includes/um-short-functions.php#L205"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset/3492178/ultimate-member/trunk/includes/um-short-functions.php"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/baafd001-144d-4ee4-b7e6-28c0931e6e10?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-285"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.11.2]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Ultimate Member \u2013 User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin", "source": "cna", "vendor": "ultimatemember"}, "product": "ultimate_member_\u2013_user_profile,_registration,_login,_member_directory,_content_restriction_&_membership_plugin", "vendor": "ultimatemember"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "wordpress", "vendor": "wordpress"}], "analysis": {"en": {"generated_at": "2026-03-28T05:49:50.007942+00:00", "value": {"mitigation_remediation": ["Update Ultimate Member to version 2.11.3 or later", "Verify that no pending posts contain the '{usermeta:password_reset_link}' shortcode before updating", "Ensure all pending posts are removed or sanitized", "Inspect administrator accounts for unexpected changes and reset passwords if necessary", "Monitor logs for unusual password reset requests"], "summary": {"action": "Immediate Patch", "impact": "Account Takeover via Password Reset Exploit"}, "threat_synthesis": {"affected_systems": "All WordPress sites running Ultimate Member up to version 2.11.2, including the default installation of Ultimate Member \u2013 User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin. The flaw affects any site where users can submit or preview pending posts containing the vulnerable shortcode. No specific CRM or server software is listed beyond WordPress, so any environment using this plugin is vulnerable.", "description_and_impact": "The Ultimate Member plugin\u2019s \u2018{usermeta:password_reset_link}\u2019 tag can be abused inside the [um_loggedin] shortcode. A logged\u2011in user with Contributor rights can embed a request that, when an Administrator previews a pending post, causes the plugin to fabricate a valid password reset token for that Administrator. The token is then sent to a malicious server, allowing the attacker to reset the Administrator\u2019s password and take full control of the site. This flaw is a clear example of broken access control, classified as CWE\u2011285, and leads to loss of confidentiality and integrity for privileged accounts.", "risk_and_exploitability": "The CVSS score of 8.0 places this vulnerability in the high severity range. Although EPSS data is unavailable, the exploit is straightforward: an authenticated user can create or edit a pending post to insert the dangerous tag, and an Administrator must preview the post. The vulnerability is not yet listed in CISA\u2019s KEV catalog. The required privileges (Contributor+) mean that a wide range of users could trigger the attack, and the ability to exfiltrate a reset token directly leads to account takeover. Given the low technical barrier, the real risk to sites that have not patched this plugin is significant."}}}}, "created": "2026-03-29T20:29:24.962124+00:00", "updated": "2026-03-30T06:59:53.528386+00:00", "vendors": ["ultimatemember", "ultimatemember$PRODUCT$ultimate_member_\u2013_user_profile,_registration,_login,_member_directory,_content_restriction_&_membership_plugin", "wordpress", "wordpress$PRODUCT$wordpress"]}