CVE-2026-8365

{"id": "CVE-2026-8365", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8365", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-09T12:55:53.628058Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@wordfence.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security@wordfence.com", "affectedData": [{"vendor": "creativethemeshq", "product": "Blocksy", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "2.1.41"}], "defaultStatus": "unaffected"}]}], "published": "2026-06-09T09:16:31.013", "references": [{"url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.35/admin/helpers/meta-boxes.php#L104", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.35/admin/helpers/validator.php#L75", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.35/inc/classes/db-versioning/utils/db-search-replacer.php#L98", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.35/inc/classes/raii.php#L12", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.41/admin/helpers/meta-boxes.php#L104", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.41/admin/helpers/validator.php#L75", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.41/inc/classes/db-versioning/utils/db-search-replacer.php#L98", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.41/inc/classes/raii.php#L12", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/trunk/admin/helpers/meta-boxes.php#L104", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/trunk/admin/helpers/validator.php#L75", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/trunk/inc/classes/db-versioning/utils/db-search-replacer.php#L98", "source": "security@wordfence.com"}, {"url": "https://themes.trac.wordpress.org/browser/blocksy/trunk/inc/classes/raii.php#L12", "source": "security@wordfence.com"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/fd216743-ce8d-4632-9fd1-d63502c2dfcd?source=cve", "source": "security@wordfence.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security@wordfence.com", "description": [{"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "The Blocksy theme for WordPress is vulnerable to PHP Object Injection leading to Remote Code Execution via the 'blocksy_meta' REST API field and the V200 database migration in versions up to and including 2.1.35. This is due to insufficient input sanitization in the blocksy_sanitize_post_meta_options() function, which only blocks values containing '<' or '>' and does not prevent serialized PHP object strings from being stored in post meta, combined with the SearchReplacer::run_recursively() function unconditionally deserializing all string values via @unserialize() during migration without restricting allowed classes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a serialized Blocksy\\RaiiPattern object into post meta that, when the V200 migration runs on an upgraded site, is deserialized and triggers RaiiPattern::__destruct(), which executes arbitrary PHP callables via call_user_func()."}, {"lang": "es", "value": "El tema Blocksy para WordPress es vulnerable a la inyecci\u00f3n de objetos PHP que conduce a la ejecuci\u00f3n remota de c\u00f3digo a trav\u00e9s del campo de la API REST 'blocksy_meta' y la migraci\u00f3n de la base de datos V200 en versiones hasta la 2.1.35 inclusive. Esto se debe a una sanitizaci\u00f3n insuficiente de la entrada en la funci\u00f3n blocksy_sanitize_post_meta_options(), que solo bloquea valores que contienen '<' o '>' y no evita que las cadenas de objetos PHP serializados se almacenen en los metadatos de las publicaciones, combinado con la funci\u00f3n SearchReplacer::run_recursively() que deserializa incondicionalmente todos los valores de cadena a trav\u00e9s de @unserialize() durante la migraci\u00f3n sin restringir las clases permitidas. Esto hace posible que atacantes autenticados, con acceso de nivel de colaborador y superior, inyecten un objeto Blocksy\\RaiiPattern serializado en los metadatos de las publicaciones que, cuando la migraci\u00f3n V200 se ejecuta en un sitio actualizado, es deserializado y activa RaiiPattern::__destruct(), que ejecuta callables PHP arbitrarios a trav\u00e9s de call_user_func()."}], "lastModified": "2026-07-23T08:10:00.137", "sourceIdentifier": "security@wordfence.com"}