CVE-2026-35569

{"id": "CVE-2026-35569", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-35569", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-16T14:14:28.804713Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 2.3}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "apostrophecms", "product": "apostrophe", "versions": [{"status": "affected", "version": "< 4.29.0"}]}]}], "published": "2026-04-15T20:16:36.353", "references": [{"url": "https://github.com/Chittu13/cve-research/tree/main/CVE-2026-35569", "source": "security-advisories@github.com"}, {"url": "https://github.com/apostrophecms/apostrophe/commit/0e57dd07a56ae1ba1e3af646ba026db4d0ab5bb3", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-855c-r2vq-c292", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-116"}]}], "descriptions": [{"lang": "en", "value": "ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a stored cross-site scripting vulnerability in SEO-related fields (SEO Title and Meta Description), where user-controlled input is rendered without proper output encoding into HTML contexts including <title> tags, <meta> attributes, and JSON-LD structured data. An attacker can inject a payload such as \"></title><script>alert(1)</script> to break out of the intended HTML context and execute arbitrary JavaScript in the browser of any authenticated user who views the affected page. This can be leveraged to perform authenticated API requests, access sensitive data such as usernames, email addresses, and roles via internal APIs, and exfiltrate it to an attacker-controlled server. This issue has been fixed in version 4.29.0."}, {"lang": "es", "value": "ApostropheCMS es un sistema de gesti\u00f3n de contenido Node.js de c\u00f3digo abierto. Las versiones 4.28.0 y anteriores contienen una vulnerabilidad de cross-site scripting almacenado en campos relacionados con SEO (T\u00edtulo SEO y Meta Descripci\u00f3n), donde la entrada controlada por el usuario se renderiza sin la codificaci\u00f3n de salida adecuada en contextos HTML, incluyendo etiquetas [title], atributos [meta] y datos estructurados JSON-LD. Un atacante puede inyectar una carga \u00fatil como \u201d>[/title][script_tag]alert(1)[/script] para salir del contexto HTML previsto y ejecutar JavaScript arbitrario en el navegador de cualquier usuario autenticado que vea la p\u00e1gina afectada. Esto puede aprovecharse para realizar solicitudes de API autenticadas, acceder a datos sensibles como nombres de usuario, direcciones de correo electr\u00f3nico y roles a trav\u00e9s de API internas, y exfiltrarlos a un servidor controlado por el atacante. Este problema ha sido solucionado en la versi\u00f3n 4.29.0."}], "lastModified": "2026-10-26T22:10:00.163", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2CFAFBDF-2EB1-404B-B370-8C510FC289AE", "versionEndExcluding": "4.29.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}