CVE-2026-1266

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Postalicious", "vendor": "neop", "versions": [{"lessThanOrEqual": "3.0.1", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Postalicious plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.0.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled."}, {"lang": "es", "value": "El plugin Postalicious para WordPress es vulnerable a cross-site scripting almacenado a trav\u00e9s de la configuraci\u00f3n de administrador en todas las versiones hasta la 3.0.1, inclusive, debido a una sanitizaci\u00f3n de entrada y un escape de salida insuficientes. Esto hace posible que atacantes autenticados, con permisos de nivel de administrador y superiores, inyecten scripts web arbitrarios en p\u00e1ginas que se ejecutar\u00e1n cada vez que un usuario acceda a una p\u00e1gina inyectada. Esto solo afecta a instalaciones multisitio e instalaciones donde se ha deshabilitado unfiltered_html."}], "id": "CVE-2026-1266", "lastModified": "2026-06-17T10:15:25.353", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 2.7, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-1266", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-26T18:04:27.802331Z", "version": "2.0.3"}}]}, "published": "2026-01-24T09:15:54.177", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/postalicious/tags/3.0.1/wp-postalicious.php#L316"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/postalicious/tags/3.0.1/wp-postalicious.php#L533"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/postalicious/tags/3.0.1/wp-postalicious.php#L541"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/postalicious/tags/3.0.1/wp-postalicious.php#L548"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/postalicious/trunk/wp-postalicious.php#L316"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/postalicious/trunk/wp-postalicious.php#L533"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/postalicious/trunk/wp-postalicious.php#L541"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/postalicious/trunk/wp-postalicious.php#L548"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/512c9a2f-b023-4e28-8dd8-35795e68a8b3?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-15T19:03:48.244720+00:00", "value": {"mitigation_remediation": ["Upgrade Postalicious to version 3.0.2 or later where the input sanitization and output escaping in the admin settings are fixed.", "If an upgrade cannot be performed immediately, disable the Postalicious plugin or remove administrator privileges from all users on the affected multisite installation. This stops the ability to inject new scripts.", "In the interim, manually review the settings of all active Postalicious installations for any suspicious JavaScript and remove it before disabling the plugin to prevent accidental script execution."], "summary": {"action": "Upgrade", "impact": "Stored Cross\u2011Site Scripting via plugin settings accessible to administrators"}, "threat_synthesis": {"affected_systems": "Vulnerable installations are those running Postalicious version 3.0.1 or earlier on WordPress multi\u2011site environments where the unfiltered_html capability is disabled. Only administrators or users with equal or greater privileges can trigger the stored payload.", "description_and_impact": "The Postalicious WordPress plugin allows administrators or higher roles to store arbitrary JavaScript in its settings. When a site visitor loads a page that displays these settings, the stored script runs in the visitor\u2019s browser. This type of stored XSS can be leveraged to exfiltrate session cookies, deface sites, or deliver malware. The vulnerability is a direct result of missing input validation and output encoding, as identified by CWE\u201179.", "risk_and_exploitability": "The CVSS base score of 4.4 indicates a moderate severity. The EPSS score of less than 1\u202f% suggests that exploitation is unlikely but not impossible. The issue is not currently listed in the CISA KEV catalog. Attackers would need authenticated administrative access on a multi\u2011site installation with unfiltered_html disabled to inject their payload, after which unsuspecting site visitors would be exposed to the injected scripts."}}}}, "created": "2026-01-26T11:48:16.203042+00:00", "updated": "2026-04-15T19:15:12.066556+00:00", "vendors": ["wordpress", "wordpress$PRODUCT$wordpress"]}