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{"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": "2026-04-22T21:30:26.497", "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"}]}, "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"}], "analysis": {"en": {"generated_at": "2026-03-19T15:53:55.225617+00:00", "value": {"mitigation_remediation": ["Upgrade Pix for WooCommerce to the latest available version (post-1.5.0).", "Verify that the updated plugin is in use and remove any older copies from the site.", "Restrict file permissions on the uploads directory to prevent execution of arbitrary files.", "Monitor web application logs for suspicious upload activity and audit the uploads folder regularly."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "All installations of the Pix for WooCommerce plugin from linknacional with version 1.5.0 or earlier are affected. No specific build numbers are listed beyond the upper bound of 1.5.0.", "description_and_impact": "The Pix for WooCommerce plugin for WordPress allows unauthenticated users to upload arbitrary files because the lkn_pix_for_woocommerce_c6_save_settings function lacks a capability check and file type validation. This flaw is a single-step vulnerability that can lead to remote code execution if an attacker uploads a malicious script to the server. The weakness is identified as CWE-434.", "risk_and_exploitability": "The vulnerability has a CVSS score of 9.8, indicating critical severity. The EPSS score is below 1%, suggesting a low probability of exploitation at this time. It is not listed in the CISA KEV catalog, indicating no known widespread exploitation. Attackers can exploit the flaw by sending an unauthenticated request to the affected plugin\u2019s settings handler, uploading a malicious file that is then accessible to the web server."}}}}, "created": "2026-03-16T09:38:00.290621+00:00", "updated": "2026-03-23T09:59:45.848312+00:00", "vendors": ["linknacional", "linknacional$PRODUCT$pix_for_woocommerce", "wordpress", "wordpress$PRODUCT$wordpress"]}