CVE-2026-3891

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Pix for WooCommerce", "vendor": "linknacional", "versions": [{"lessThanOrEqual": "1.5.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Pix for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing capability check and missing file type validation in the 'lkn_pix_for_woocommerce_c6_save_settings' function in all versions up to, and including, 1.5.0. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible."}, {"lang": "es", "value": "El plugin Pix for WooCommerce para WordPress es vulnerable a la carga arbitraria de archivos debido a la falta de verificaci\u00f3n de capacidades y la falta de validaci\u00f3n del tipo de archivo en la funci\u00f3n 'lkn_pix_for_woocommerce_c6_save_settings' en todas las versiones hasta la 1.5.0, inclusive. Esto permite a atacantes no autenticados cargar archivos arbitrarios en el servidor del sitio afectado, lo que podr\u00eda posibilitar la ejecuci\u00f3n remota de c\u00f3digo."}], "id": "CVE-2026-3891", "lastModified": "2026-06-17T10:44:23.283", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3891", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-13T14:12:16.841284Z", "version": "2.0.3"}}]}, "published": "2026-03-13T19:55:10.983", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/payment-gateway-pix-for-woocommerce/tags/1.4.0/Includes/LknPaymentPixForWoocommercePixC6.php#L694"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset/3480639/payment-gateway-pix-for-woocommerce#file56"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/20188fd3-c330-4c76-912b-72731e14c450?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-434"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.5.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "pix_for_woocommerce", "vendor": "linknacional"}, {"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"}], "created": "2026-03-16T09:38:00.290621+00:00", "updated": "2026-11-08T15:00:10.784017+00:00", "vendors": ["linknacional", "linknacional$PRODUCT$pix_for_woocommerce", "wordpress", "wordpress$PRODUCT$wordpress"]}