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{"cveTags": [], "descriptions": [{"lang": "en", "value": "The Nexter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple widgets in all versions up to, and including, 4.5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."}, {"lang": "es", "value": "El complemento Nexter Blocks para WordPress es vulnerable a Cross-Site Scripting almacenado a trav\u00e9s de m\u00faltiples widgets en todas las versiones hasta la 4.5.4 incluida, debido a una depuraci\u00f3n de entrada insuficiente y al escape de salida en los atributos proporcionados por el usuario. Esto permite a atacantes autenticados, con acceso de colaborador o superior, inyectar scripts web arbitrarios en las p\u00e1ginas que se ejecutar\u00e1n al acceder un usuario a una p\u00e1gina inyectada."}], "id": "CVE-2025-8567", "lastModified": "2026-04-15T00:35:42.020", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 2.7, "source": "security@wordfence.com", "type": "Secondary"}]}, "published": "2025-08-19T09:15:33.073", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset/3342664/"}, {"source": "security@wordfence.com", "url": "https://wordpress.org/plugins/the-plus-addons-for-block-editor/#developers"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/ca9ad8ca-aad1-4950-b540-64ffc4a07c12?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": "2026-04-21T03:26:56.507367+00:00", "value": {"mitigation_remediation": ["Update Nexter Blocks to a fixed version that implements proper input validation and output escaping.", "If an update is not available, remove or disable the vulnerable widgets or reduce contributor access to prevent content injection.", "Apply a site\u2011wide Content Security Policy that blocks inline scripts or restricts script sources, mitigating the impact while awaiting a patch."], "summary": {"action": "Apply Patch", "impact": "Stored Cross\u2011Site Scripting available to users with contributor-level access"}, "threat_synthesis": {"affected_systems": "This flaw exists in all releases of Nexter Blocks \u2013 Gutenberg Blocks, Page Builder & AI Website Builder up to and including version 4.5.4, developed by posimyththemes. WordPress sites that have installed the plugin and possess contributor\u2011level or higher accounts are impacted.", "description_and_impact": "The Nexter Blocks plugin for WordPress is affected by a stored cross\u2011site scripting flaw that allows authenticated users with contributor or higher privileges to inject arbitrary JavaScript into widget attributes. The vulnerability stems from insufficient input sanitization and output escaping, which causes malicious scripts to execute whenever a page containing the injected widget is rendered.", "risk_and_exploitability": "The CVSS score of 6.4 indicates medium severity, while the EPSS score of less than 1% shows a very low likelihood of exploitation. The vulnerability is not listed in the CISA KEV catalog. Attackers must be authenticated with at least contributor privileges to add or edit a widget; after the payload is stored, it runs for every visitor who accesses the affected page."}}}}, "created": "2026-04-21T03:30:26.337915+00:00", "updated": "2026-04-21T03:30:26.337932+00:00", "vendors": []}