CVE-2026-10100

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Simple Custom Login Page", "vendor": "pattihis", "versions": [{"lessThanOrEqual": "1.0.3", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Simple Custom Login Page plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the color settings fields (Page Background, Form Background, Text Color, Link Color) in versions up to and including 1.0.3. This is due to insufficient input sanitization of the color option values (they were registered with register_setting() and stored via the Settings API/update_option() with no sanitize_callback) combined with the values being output into a <style> block on wp-login.php using esc_attr(), which is incorrect for a CSS context (it does not escape ;, {, }, / or *). This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary CSS rules into the login page that are rendered for all unauthenticated visitors, enabling UI-redress and credential-phishing attacks."}, {"lang": "es", "value": "El plugin Simple Custom Login Page para WordPress es vulnerable a cross-site scripting almacenado a trav\u00e9s de los campos de configuraci\u00f3n de color (Fondo de P\u00e1gina, Fondo de Formulario, Color de Texto, Color de Enlace) en versiones hasta la 1.0.3 inclusive. Esto se debe a una sanitizaci\u00f3n de entrada insuficiente de los valores de las opciones de color (fueron registrados con register_setting() y almacenados a trav\u00e9s de la API de Ajustes/update_option() sin sanitize_callback) combinado con que los valores se muestran en un bloque <style> en wp-login.php usando esc_attr(), lo cual es incorrecto para un contexto CSS (no escapa ;, {, }, / o *). Esto hace posible que atacantes autenticados, con acceso de nivel de administrador y superior, inyecten reglas CSS arbitrarias en la p\u00e1gina de inicio de sesi\u00f3n que se renderizan para todos los visitantes no autenticados, lo que permite ataques de suplantaci\u00f3n de interfaz de usuario (UI-redress) y phishing de credenciales."}], "id": "CVE-2026-10100", "lastModified": "2026-07-22T19:10:00.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 2.7, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-10100", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-02T10:39:35.212951Z", "version": "2.0.3"}}]}, "published": "2026-06-02T03:16:15.077", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/simple-custom-login-page/tags/1.0.3/admin/class-simple-custom-login-page-admin.php#L206"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/simple-custom-login-page/tags/1.0.3/includes/class-simple-custom-login-page.php#L248"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/96d03984-623a-44c7-a46f-e1aabbc566d5?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.0.3]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Simple Custom Login Page", "source": "cna", "vendor": "pattihis"}, "product": "simple_custom_login_page", "vendor": "pattihis"}, {"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": "2026-06-02T04:00:13.046955+00:00", "updated": "2026-06-02T20:52:12.816353+00:00", "vendors": ["pattihis", "pattihis$PRODUCT$simple_custom_login_page", "wordpress", "wordpress$PRODUCT$wordpress"]}