CVE-2026-2826

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Kadence Blocks \u2014 Page Builder Toolkit for Gutenberg Editor", "vendor": "stellarwp", "versions": [{"lessThanOrEqual": "3.6.3", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Kadence Blocks \u2014 Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.6.3. This is due to the plugin not properly verifying that a user has the `upload_files` capability in the `process_pattern` REST API endpoint. This makes it possible for authenticated attackers, with contributor level access and above, to upload images to the WordPress Media Library by supplying remote image URLs that the server downloads and creates as media attachments."}, {"lang": "es", "value": "El plugin Kadence Blocks - Page Builder Toolkit for Gutenberg Editor para WordPress es vulnerable a una omisi\u00f3n de autorizaci\u00f3n en todas las versiones hasta la 3.6.3, inclusive. Esto se debe a que el plugin no verifica correctamente que un usuario tenga la capacidad 'upload_files' en el endpoint de la API REST 'process_pattern'. Esto hace posible que atacantes autenticados, con acceso de nivel de colaborador y superior, suban im\u00e1genes a la Biblioteca de Medios de WordPress al proporcionar URLs de im\u00e1genes remotas que el servidor descarga y crea como adjuntos de medios."}], "id": "CVE-2026-2826", "lastModified": "2026-07-21T19:10:00.107", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-2826", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-06T13:20:14.362434Z", "version": "2.0.3"}}]}, "published": "2026-04-04T09:16:20.167", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.6.4/includes/class-kadence-blocks-prebuilt-library-rest-api.php#L1224"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/5f91df7e-5d9d-4a3a-9afc-d771106a0be6?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.6.3]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Kadence Blocks \u2014 Page Builder Toolkit for Gutenberg Editor", "source": "cna", "vendor": "stellarwp"}, "product": "kadence_blocks_\u2014_page_builder_toolkit_for_gutenberg_editor", "vendor": "stellarwp"}, {"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": "2026-04-04T11:50:42.228981+00:00", "value": {"mitigation_remediation": ["Upgrade Kadence Blocks to version 3.6.4 or later to enable the missing authorization check.", "Review user role capabilities to ensure contributors do not have the 'upload_files' capability unless necessary."], "summary": {"action": "Apply Patch", "impact": "Unauthorized Media Upload"}, "threat_synthesis": {"affected_systems": "The affected product is Kadence Blocks \u2013 Page Builder Toolkit for Gutenberg Editor from StellarWP. All versions up to and including 3.6.3 contain the flaw; it was fixed in version 3.6.4 and later.", "description_and_impact": "The Kadence Blocks plugin for WordPress suffers from an authorization bypass that can be classified as CWE\u2011862 (Missing Authorization). When the REST API endpoint responsible for processing pattern requests receives a request to upload a remote image, it does not verify that the user possesses the 'upload_files' capability. As a result, any authenticated user with at least contributor level can supply a URL, cause the server to download the image, and create a media attachment in the Media Library without proper authorization.", "risk_and_exploitability": "The CVSS base score of 4.3 indicates moderate severity and no evidence of remote code execution or privilege escalation. EPSS data is not available and the vulnerability is not listed in the CISA KEV catalog. Attackers must be authenticated with contributor-level permissions or higher; the only requirement is access to the REST API endpoint to supply a remote image URL. The risk lies in the ability to inject arbitrary media, which could be used to publish malicious content or disrupt site operations."}}}}, "created": "2026-04-06T20:27:33.517859+00:00", "updated": "2026-04-06T22:20:52.642245+00:00", "vendors": ["stellarwp", "stellarwp$PRODUCT$kadence_blocks_\u2014_page_builder_toolkit_for_gutenberg_editor", "wordpress", "wordpress$PRODUCT$wordpress"]}